Essential Calculus
2nd Edition
ISBN: 9781285209067
Author: Stewart
Publisher: Cengage
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(a) By graphing the function f(x) = (cos 2x − cos x)/x2 and zooming in toward the point where the graph crosses the y-axis, estimate the value of
lim x → 0 f(x).
Check your answer in part (a) by evaluating
f(x)
for values of x that approach 0. (Round your answers to six decimal places.)
f(0.1)
=
f(0.01)
=
f(0.001)
=
f(0.0001)
=
f(−0.1)
=
f(−0.01)
=
f(−0.001)
=
f(−0.0001)
=
lim x→0 f(x)
=
1. Evaluate: lim x→2 (x^2 − 4x + 4)/(tan^2(x2 − 4))
2. Use the Intermediate Value Theorem to show that f(x) = cos^−1 (x) − e^x has a zero in the interval [0, 1].
3. Use the Squeeze Theorem to evaluate: lim x→0+ sin(ln x) csch(cot x).
Hi I need help on solving this problem for my calculus:
Evaluate the limit:
lim x -> (3pi)/(2)
(sin2(x) + 6 sin(x) + 5)/ (sin2(x) - 1)
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- (a) What is wrong with the following equation? x2 + x − 12 x − 3 = x + 4 (x − 3)(x + 4) ≠ x2 + x − 12 The left-hand side is not defined for x = 0, but the right-hand side is. The left-hand side is not defined for x = 3, but the right-hand side is.None of these — the equation is correct. (b) In view of part (a), explain why the equation lim x → 3 x2 + x − 12 x − 3 = lim x → 3 (x + 4) is correct. Since x2 + x − 12 x − 3 and x + 4 are both continuous, the equation follows. Since the equation holds for all x ≠ 3, it follows that both sides of the equation approach the same limit as x → 3. This equation follows from the fact that the equation in part (a) is correct.None of these — the equation is not correct.arrow_forwardEvalute the limit of: lim x->0 (x csc 6x)/(cos 14x) The answer must be in simplified form or a fractionarrow_forwardWe know lim 2x -1 = 5 x→3 What value of x guarantees that f(x) = 2x -1 is within 0.2 units of 5? Show your work.arrow_forward
- For the function f(x) = x 4 ln x (a) Show a careful calculation explaining why limx→0+ f(x) = 0 ( asserting that (0)(−∞) = 0 is not careful enough) (b) Calculate a formula for f 0 (x), the derivative of f. (c) Find the critical number(s) for the function f. (d) Determine the absolute maximum and absolute minimum values of f on the interval 1 2 ≤ x ≤ 1, and the exact x values at which these maximum & minimum values occur. Please solve part b c D with a detailed solution.arrow_forwardF(x)={tan(x+3) x<-3 {(x3)3+1 -3<=x Find lim(x-->3-) f(x) Photo better depicts problem, thank you!arrow_forwardA. Does f(1) exist B. Does lim x->1 f(x) exist C. Does lim x->1 f(x) equal f(1) D. Is the function continuous at x=1arrow_forward
- A process creates a radioactive substance at the rate of 1 g/hr, and the substance decays at an hourly rate equal to 1/10 of the mass present (expressed in grams). Assuming that there are initially 20 g, find the mass S(t) of the substance present at time t, and find lim S(t) as t approaches infinityarrow_forwardLet G(t) = (1 - cos t)/t2. a. Make tables of values of G at values of t that approach t0 = 0 from above and below. Then estimate lim t-->0 G(t). b. Support your conclusion in part (a) by graphing G near t0 = 0arrow_forward5. Let: f(x) = 1 /x (a) Use the limit definition of derivative to find f'(x). (b) Verify your answer to (a) using the Power Rule. (c) Use the Power Rule to find f"(x), f'''(x) and f^(4) (x). Find a pattern in the derivatives and make a conjecture for a formula for f^(n) (x), the nth derivative of f(x).arrow_forward
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