Find the x-coordinate of the point at which the tangent to the curve x > 0 is horizontal. Give the exact value of x. (Note that by the order of operations, y = , not

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter3: Functions And Graphs
Section3.2: Graphs Of Equations
Problem 90E
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Find the x-coordinate of the point at which the tangent to the curve
y =
x> 0
is horizontal. Give the exact value of x. (Note that by the order of operations, y =
not (x")5 = 25 ,
a
va
|a|
sin (a)
T
Transcribed Image Text:Find the x-coordinate of the point at which the tangent to the curve y = x> 0 is horizontal. Give the exact value of x. (Note that by the order of operations, y = not (x")5 = 25 , a va |a| sin (a) T
Expert Solution
Step 1

Here, we need to find the x-coordinate of the point at which the tangent to the curve y=xx5, x>0 is horizontal.

We know theexponentrule:  ab=eblna.

Now, 

     dydx=ddxxx5     =ddxex5lnx     =ex5lnxx5lnx'(by the chain rule)     =ex5lnx5x4lnx+x4  (by using the product rule)     =xx55x4lnx+x4 as ex5lnx=xx5

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