Please solve a. When tangent line is f(x)=x^3+4x and slope =-1, it is passing through point (2, a). (a < 0).

Calculus: Early Transcendentals
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ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
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Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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Please solve a. When tangent line is f(x)=x^3+4x and slope =-1, it is passing through point (2, a). (a < 0).

Expert Solution
Step 1

Given tangent line is .... f(X)= X3 +4X       and slope = -1 

f1(x) = ddxx3+4x

        = 3x2+4

M = f1(x) = 3(2)2+ 4 = 16 

            

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