23. Let \( g \) be a differentiable function such that \( g(12) = 4 \), \( g(3) = 6 \), \( g'(12) = -5 \), and \( g'(3) = -2 \). The function \( h \) is differentiable and \( h(x) = g^{-1}(x) \) for all \( x \). What is the value of \( h'(6) \)?






Answer is: option2

\( \frac{-1}{2} \)

Solution:

Since \( h(x) = g^{-1}(x) \), the derivative of the inverse function \( h'(x) \) is given by the formula: \[ h'(x) = \frac{1}{g'(h(x))} \] We are asked to find \( h'(6) \). From the given information, \( g(3) = 6 \), which means \( h(6) = 3 \). Now we can compute \( h'(6) \) as follows: \[ h'(6) = \frac{1}{g'(h(6))} = \frac{1}{g'(3)} \] Since \( g'(3) = -2 \), we have: \[ h'(6) = \frac{1}{-2} = -\frac{1}{2} \]

Final Answer:

The correct answer is B) \( \frac{1}{-2} \).

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