Question

Find all the values of x where the tangent line is horizontal. f(x) = 2x^3 + 39x^2 + 240x + 7 x = (Simplify your answer. Use a comma to separate answers as needed.)

          Find all the values of x where the tangent line is horizontal.
f(x) = 2x^3 + 39x^2 + 240x + 7
x = (Simplify your answer. Use a comma to separate answers as needed.)

Added by Sandra M.

Calculus: Early Transcendentals

James Stewart 8th Edition

Instant Answer

Solved by Expert Zhumagali Shomanov

03/29/2023

Step 1

f'(x) = 6x^2 + 78x + 240 Show more…

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Question

Find all the values of x where the tangent line is horizontal. f(x) = 2x^3 + 39x^2 + 240x + 7 x = (Simplify your answer. Use a comma to separate answers as needed.)

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