Q. For the following equation, evaluate f′(1).f(x)=−3x5+3Answer:
Identify function & derivative: Identify the function and the derivative to be evaluated.We are given the function f(x)=−3x5+3 and we need to find its derivative f′(x) at x=1.
Calculate derivative of function: Calculate the derivative of the function f(x). The derivative of f(x)=−3x5+3 with respect to x is f′(x)=dxd(−3x5)+dxd(3). Using the power rule for differentiation, the derivative of −3x5 is −15x4. The derivative of a constant, 3, is 0. So, f′(x)=−15x4+0, which simplifies to f′(x)=−15x4.
Evaluate derivative at x=1: Evaluate the derivative at x=1. Substitute x=1 into the derivative f′(x)=−15x4 to find f′(1). f′(1)=−15(1)4f′(1)=−15(1)f′(1)=−15
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