The graphs of f and g are shown. Let h(x) = f(g(x)) and s(x) = g(J(x)). Find each derivative , if it exists. If the derivative ve does not exist, explain why. Find h'( 1).

Arnav Heath

Arnav Heath

Open question

2022-08-19

The graphs of f and g are shown. Let h(x) = f(g(x)) and s(x) = g(J(x)).
Find each derivative , if it exists. If the derivative ve does not exist, explain why.
Find h'( 1).

Answer & Explanation

Willow Avery

Willow Avery

Beginner2022-08-20Added 11 answers

To find the derivative of the function we will use Chain Rule:
ddx[f(g(x))=f(g(x))=g(x)]
h'(x)=f'(g(x))g'(x)
Plug in x=1 to find h'(1).
h'(1)=f'(g(1))g'(1)
=f'(4)g'(1)
=(1)(12)
=12
To estimate f'(4), there is a part of the picture where we can see that the tangent line goes down 1 unit as the variable x moves one unit to the right. This means that it has slope -1, thus f'(4)=-1.
To estimate g'(1), there is a part of the picture where we can see that the tangent line goes down 1 unit as the variable x moves two units to the right. This means that it has
slope 12, thus g(1)=12.
Result:
a=12

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