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8th Edition

James Stewart

Publisher: Cengage Learning

ISBN: 9781305270336

Chapter 2, Problem 21RQ

Textbook Problem

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Determine whether the statement is true or false. If it is true, explain why. If it is false, explain why or give an example that disproves the statement.

If *f* is continuous at *a*, then *f* is differentiable at *a*.

Expert Solution

To determine

Whether the statement, “if *f* is continuous at *a* then *f* is differentiable at *a*” is true or false.

**Theorem used:** If *f* is continuous at *b* and

**Theorem used:** If *f* is differentiable at *a* then

**Definition of limit:** The limit of the function is defined as

**Result used:** The limit of the function

The function *f* is continuous at *a*, but not differentiable at *a.*

Because, the right and left derivatives of a function are not equal.

**Example:**

Let the function

**Calculation:**

The limit of the function is defined as

Single Variable Calculus: Early Transcendentals

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Brine...Ch. 2.6 - In Chapter 9 we will be able to show, under...Ch. 2.6 - (a) By graphing y = ex/10 and y = 0.1 on a common...Ch. 2.6 - Use a graph to find a number N such that if x N...Ch. 2.6 - For the limit limx13xx2+1=3 illustrate Definition...Ch. 2.6 - For the limit limx13xx2+1=3 illustrate Definition...Ch. 2.6 - For the limit limxxlnx= illustrate Definition 9 by...Ch. 2.6 - (a) How large do we have to take x so that 1/x2 ...Ch. 2.6 - (a) How large do we have to take x so that...Ch. 2.6 - Use Definition 8 to prove that limx1x=0....Ch. 2.6 - Prove, using Definition 9, that limxx3=....Ch. 2.6 - Use Definition 9 to prove that limxex=. Definition...Ch. 2.6 - Formulate a precise definition of limxf(x)= Then...Ch. 2.6 - (a) Prove that limxf(x)=limt0+f(1/t) and...Ch. 2.7 - A curve has equation y = f(x) (a) Write an...Ch. 2.7 - Graph the curve y = ex in the viewing rectangles [...Ch. 2.7 - (a) Find the slope of the tangent line to the...Ch. 2.7 - (a) Find the slope of the tangent line to the...Ch. 2.7 - Find an equation of the tangent line to the curve...Ch. 2.7 - Find an equation of the tangent line to the curve...Ch. 2.7 - Find an equation of the tangent line to the curve...Ch. 2.7 - Find an equation of the tangent line to the curve...Ch. 2.7 - (a) Find the slope of the tangent to the curve y =...Ch. 2.7 - (a) Find the slope of the tangent to the curve...Ch. 2.7 - (a) A particle starts by moving to the right along...Ch. 2.7 - Shown are graphs of the position functions of two...Ch. 2.7 - If a ball is thrown into the air with a velocity...Ch. 2.7 - If a rock is thrown upward on the planet Mars with...Ch. 2.7 - The displacement (in meters) of a particle moving...Ch. 2.7 - The displacement (in feel) of a particle moving in...Ch. 2.7 - For the function g whose graph is given, arrange...Ch. 2.7 - The graph of a function f is shown. (a) Find the...Ch. 2.7 - For the function f graphed in Exercise 18: (a)...Ch. 2.7 - Find an equation of the tangent line to the graph...Ch. 2.7 - If an equation of the tangent tine to the curve y...Ch. 2.7 - If the tangent line to y= f(x) at (4, 3) passes...Ch. 2.7 - Sketch the graph of a function f for which f(0) =...Ch. 2.7 - Sketch the graph of a function g for which g(0) =...Ch. 2.7 - Sketch the graph of a function q that is...Ch. 2.7 - Sketch the graph of a function f where the domain...Ch. 2.7 - If f(x) = 3x2 x3 , find f'(l) and use it to find...Ch. 2.7 - If g(x) = x4 2, find g'(l) and use it to find an...Ch. 2.7 - (a) If F(x) = 5x/(l + x2), find F'(2) and use it...Ch. 2.7 - (a) If G(x) = 4x2 x3, find G'(a) and use it to...Ch. 2.7 - Find f'(a). f(x) = 3x2 4x + 1Ch. 2.7 - Find f'(a). f(t) = 2t3 + tCh. 2.7 - Find f'(a). f(t)=2t+1t+3Ch. 2.7 - Find f'(a). f(x) = x2Ch. 2.7 - Find f'(a). f(x)=12xCh. 2.7 - Find f'(a). f(x)=41xCh. 2.7 - Each limit represents the derivative of some...Ch. 2.7 - Each limit represents the derivative of some...Ch. 2.7 - Each limit represents the derivative of some...Ch. 2.7 - Each limit represents the derivative of some...Ch. 2.7 - Each limit represents the derivative of some...Ch. 2.7 - Each limit represents the derivative of some...Ch. 2.7 - A particle moves along a straight line with...Ch. 2.7 - A particle moves along a straight line with...Ch. 2.7 - A warm can of soda is placed in a cold...Ch. 2.7 - A roast is taken from an over when its temperature...Ch. 2.7 - Reasearchers measured the average blood alcohol...Ch. 2.7 - The number N of locations of a popular coffeehouse...Ch. 2.7 - The table shows world average daily oil...Ch. 2.7 - The table shows values of the viral load V(r) in...Ch. 2.7 - The cost (in dollars) of producing x units of a...Ch. 2.7 - The cost of producing x ounces of gold from a new...Ch. 2.7 - The number of bacteria after r hours in a...Ch. 2.7 - Let H(t) be the daily cost (in dollars) to heat an...Ch. 2.7 - The quantity (in pounds) of a gourmet ground...Ch. 2.7 - The quantity of oxygen that can dissolve in water...Ch. 2.7 - The graph shows the influence of the temperature T...Ch. 2.7 - Determine whether f'(0) exists....Ch. 2.7 - Determine whether f'(0) exists....Ch. 2.7 - (a) Graph the function f(x)=sinx11000sin(1000x) in...Ch. 2.8 - Use the given graph to estimate the value of each...Ch. 2.8 - Use the given graph to estimate the value of each...Ch. 2.8 - Match the graph of each function in (a)(d) with...Ch. 2.8 - Trace or copy the graph of the given function .f....Ch. 2.8 - Trace or copy the graph of the given function .f....Ch. 2.8 - Trace or copy the graph of the given function .f....Ch. 2.8 - Trace or copy the graph of the given function .f....Ch. 2.8 - Trace or copy the graph of the given function .f....Ch. 2.8 - Trace or copy the graph of the given function .f....Ch. 2.8 - Trace or copy the graph of the given function .f....Ch. 2.8 - Trace or copy the graph of the given function .f....Ch. 2.8 - Shown is the graph of the population function P(t)...Ch. 2.8 - A rechargeable battery is plugged into a charger....Ch. 2.8 - The graph (from the US Department of Energy) shows...Ch. 2.8 - The graph shows how the average age of first...Ch. 2.8 - Make a careful sketch of the graph if .f and below...Ch. 2.8 - Make a careful sketch of the graph if .f and below...Ch. 2.8 - Make a careful sketch of the graph if .f and below...Ch. 2.8 - Let .f (x) = x2. (a) Estimate the values of f'(0),...Ch. 2.8 - Let f(x) = x3. (a) Estimate the values of f'(0),...Ch. 2.8 - Find the derivative of the function using the...Ch. 2.8 - Find the derivative of the function using the...Ch. 2.8 - Find the derivative of the function using the...Ch. 2.8 - Find the derivative of the function using the...Ch. 2.8 - Find the derivative of the function using the...Ch. 2.8 - Find the derivative of the function using the...Ch. 2.8 - Find the derivative of the function using the...Ch. 2.8 - Find the derivative of the function using the...Ch. 2.8 - Find the derivative of the function using the...Ch. 2.8 - Find the derivative of the function using the...Ch. 2.8 - Find the derivative of the function using the...Ch. 2.8 - (a) Sketch the graph of f(x)=6x by starting with...Ch. 2.8 - (a) If f(x) = x4 + 2x, find f'(x). (b) Check to...Ch. 2.8 - (a) If f(x) = x + 1/x, find f'(x). (b) Chock to...Ch. 2.8 - The unemployment rate U(t) varies with time. The...Ch. 2.8 - The table gives the number N(t), measured in...Ch. 2.8 - The table gives the height as time passes of a...Ch. 2.8 - Water temperature affects the growth rate of brook...Ch. 2.8 - Let P represent the percentage of a city's...Ch. 2.8 - Suppose N is the number of people in the United...Ch. 2.8 - The graph of f is given. State, with reasons, the...Ch. 2.8 - The graph of f is given. State, with reasons, the...Ch. 2.8 - The graph of f is given. State, with reasons, the...Ch. 2.8 - The graph of f is given. State, with reasons, the...Ch. 2.8 - Graph the function f(x)=x+x. Zoom in repeatedly,...Ch. 2.8 - Zoom in toward the points (1, 0), (0, 1). and (1,...Ch. 2.8 - The graphs of a function f and its derivative f'...Ch. 2.8 - The graphs of a function f and its derivative f'...Ch. 2.8 - The figure shows the graphs of f, f', and f"....Ch. 2.8 - The figure shows graphs of f; f', f", and f'"....Ch. 2.8 - The figure shows the graphs of three functions....Ch. 2.8 - The figure shows the graphs of four functions. One...Ch. 2.8 - Use the definition of a derivative to find f'(x)...Ch. 2.8 - Use the definition of a derivative to find f'(x)...Ch. 2.8 - If f(x) = 2x2 x3, find f'(x), f"(x), f'"(x), and...Ch. 2.8 - (a) The graph of a position function of a car is...Ch. 2.8 - Let f(x)=x3. (a) If a 0, use Equation 2 .7 .5 to...Ch. 2.8 - (a) If g(x) = x2/3, show that g'(0) does not...Ch. 2.8 - Show that the function f(x) = | x 6| is not...Ch. 2.8 - Where is the greatest integer function f(x) = [[ x...Ch. 2.8 - (a) Sketch the graph of the function f(x) = x |x...Ch. 2.8 - (a) Sketch the graph of the function g(x) = x +...Ch. 2.8 - Recall that a function f is called even if f(x) =...Ch. 2.8 - The left-hand and right-hand derivatives off at a...Ch. 2.8 - Nick starts jogging and runs faster and faster for...Ch. 2.8 - When you turn on a hot -water faucet, the...Ch. 2.8 - Let f be the tangent line to the parabola y = x2...Ch. 2 - Explain what each of the following means and...Ch. 2 - Describe several ways in which a limit can fail to...Ch. 2 - State the following limit Laws. (a) Sum Law (b)...Ch. 2 - What does the Squeeze Theorem say?Ch. 2 - (a) What does it mean to say that the line x = a...Ch. 2 - Which of the following curves have vertical...Ch. 2 - (a) What does it mean for f to be continuous at a?...Ch. 2 - (a) Give examples of functions that a:e continuous...Ch. 2 - What does the Intermediate Value Theorem say?Ch. 2 - Write an expression for the slope of the tangent...Ch. 2 - Suppose an object moves along a straight line...Ch. 2 - If y = f(x) and x changes from x1, to x2, write...Ch. 2 - Define the derivative f'(a). Discuss two way of...Ch. 2 - Define the second derivative of f. If f(t) is the...Ch. 2 - (a) What does it mean for f to be differentiable...Ch. 2 - Describe several ways in which a function can fail...Ch. 2 - Determine whether the statement is true or false....Ch. 2 - Determine whether the statement is true or false....Ch. 2 - Determine whether the statement is true or false....Ch. 2 - Determine whether the statement is true or false....Ch. 2 - Determine whether the statement is true or false....Ch. 2 - Determine whether the statement is true or false....Ch. 2 - Determine whether the statement is true or false....Ch. 2 - Determine whether the statement is true or false....Ch. 2 - Determine whether the statement is true or false....Ch. 2 - Determine whether the statement is true or false....Ch. 2 - Determine whether the statement is true or false....Ch. 2 - Determine whether the statement is true or false....Ch. 2 - Determine whether the statement is true or false....Ch. 2 - Determine whether the statement is true or false....Ch. 2 - Determine whether the statement is true or false....Ch. 2 - Determine whether the statement is true or false....Ch. 2 - Determine whether the statement is true or false....Ch. 2 - Determine whether the statement is true or false....Ch. 2 - Determine whether the statement is true or false....Ch. 2 - Determine whether the statement is true or false....Ch. 2 - Determine whether the statement is true or false....Ch. 2 - Determine whether the statement is true or false....Ch. 2 - Determine whether the statement is true or false....Ch. 2 - Determine whether the statement is true or false....Ch. 2 - Determine whether the statement is true or false....Ch. 2 - Determine whether the statement is true or false....Ch. 2 - The graph of f is given. (a) Find each limit, or...Ch. 2 - Sketch the graph of a function f that satisfies...Ch. 2 - Find the limit. limx1ex3xCh. 2 - Find the limit. limx3x29x2+2x3Ch. 2 - Find the limit. limx3x29x2+2x3Ch. 2 - Find the limit. limx1+x29x2+2x3Ch. 2 - Find the limit. limh0(h1)3+1hCh. 2 - Find the limit. limt2t24t38Ch. 2 - Find the limit. limr9r(r9)4Ch. 2 - Find the limit. limv4+4v4vCh. 2 - Find the limit. limu1u41u3+5u26uCh. 2 - Find the limit. limx3x+6xx33x2Ch. 2 - Find the limit. limxx292x6Ch. 2 - Find the limit. limxx292x6Ch. 2 - Find the limit. limxln(sinx)Ch. 2 - Find the limit. limx12x2x45+x3x4Ch. 2 - Find the limit. limx(x2+4x+1x)Ch. 2 - Find the limit. limxexx2Ch. 2 - Find the limit. limx0+tan1(1/x)Ch. 2 - Find the limit. limx1(1x1+1x23x+2)Ch. 2 - Use graphs to discover the asymptotes of the...Ch. 2 - Use graphs to discover the asymptotes of the...Ch. 2 - If 2x 1 f(x) x2 for 0 x 3, find limx1f(x).Ch. 2 - Prove that limx0x2cos(1/x2)=0.Ch. 2 - Prove the statement using the precise definition...Ch. 2 - Prove the statement using the precise definition...Ch. 2 - Prove the statement using the precise definition...Ch. 2 - Prove the statement using the precise definition...Ch. 2 - Let f(x)={xifx03xif0x3(x3)2ifx3 (a) Evaluate each...Ch. 2 - Let g(x)={2xx2if0x22xif2x3x4if3x4ifx4 a) For each...Ch. 2 - Show that the function is continuous on its...Ch. 2 - Show that the function is continuous on its...Ch. 2 - Use the Intermediate Value Theorem to show that...Ch. 2 - Use the Intermediate Value Theorem to show that...Ch. 2 - (a) Find the slope of the tangent line to the...Ch. 2 - Find equations of the tangent lines to the curve...Ch. 2 - The displacement (in meters) of an object moving...Ch. 2 - According to Boyle's Law, if the temperature of a...Ch. 2 - (a) Use the definition of a derivative to find...Ch. 2 - Find a function f and a number a such that...Ch. 2 - The total cost of repaying a student loan at an...Ch. 2 - Trace or copy the graph of the function. Then...Ch. 2 - Trace or copy the graph of the function. Then...Ch. 2 - Trace or copy the graph of the function. Then...Ch. 2 - (a) If f(x)=35x, use the definition of a...Ch. 2 - (a) Find the asymptotes of the graph of f(x)=4x3+x...Ch. 2 - The graph of .f is shown. State, with reasons, the...Ch. 2 - The figure shows the graphs of f, f', and f"....Ch. 2 - Sketch the graph or a function .f that satisfies...Ch. 2 - Let P(t) be the percentage of Americans under the...Ch. 2 - Let B(t) be the number of US 20 bills in...Ch. 2 - The total fertility rate at time t, denoted by...Ch. 2 - Suppose that | f(x) | g(x) for all x, where...Ch. 2 - Let f(x)=x+x. (a) For what values of a does...Ch. 2 - Evaluate limx1x31x1Ch. 2 - Find numbers a and b such that limx0ax+b2x=1.Ch. 2 - Evaluate limx02x12x+1x.Ch. 2 - The figure shows a point P on the parabola y = x2...Ch. 2 - Evaluate the following limits, if they exist,...Ch. 2 - Sketch the region in the plane defined by each of...Ch. 2 - Find all values of a such that f is continuo us on...Ch. 2 - A fixed point of a function f is a number c in its...Ch. 2 - If limxa[f(x)+g(x)]=2andlimxa[f(x)g(x)]=1, find...Ch. 2 - (a) The figure shows an isosceles triangle ABC...Ch. 2 - (a) If we start. from 0 latitude and proceed in a...Ch. 2 - If f is a differentiable function and g(x) =...Ch. 2 - Suppose f is a function that satisfies the...Ch. 2 - Suppose f is a function with the property that |...

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