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Multiple Choice
If and is the inverse function of , what is the value of ?
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Verified step by step guidance
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Step 1: Recall the formula for the derivative of an inverse function. If g is the inverse of f, then g'(a) = 1 / f'(g(a)). This formula is key to solving the problem.
Step 2: Identify the given information. We are tasked with finding g'(1), where g is the inverse of f(x) = sin(x) + 2x + 1. This means g(1) is the x-value such that f(x) = 1.
Step 3: Solve for g(1) by setting f(x) = 1. This requires solving the equation sin(x) + 2x + 1 = 1 for x. Note that this step may involve numerical or graphical methods since the equation is transcendental.
Step 4: Once g(1) is determined, compute f'(x). The derivative of f(x) is f'(x) = cos(x) + 2. This derivative will be used in the formula for g'(1).
Step 5: Substitute g(1) into the formula for g'(1). Using g'(1) = 1 / f'(g(1)), replace g(1) with the x-value found in Step 3 and f'(x) with cos(x) + 2. Simplify the expression to find g'(1).