Q. For the following equation, evaluate f′(1).f(x)=−2x3+5Answer:
Identify Function and Derivative: Identify the function and the derivative to be evaluated.We are given the function f(x)=−2x3+5 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)=−2x3+5 with respect to x is f′(x)=dxd(−2x3)+dxd(5). Using the power rule for differentiation, the derivative of −2x3 is −6x2. The derivative of a constant, 5, is 0. So, f′(x)=−6x2+0, which simplifies to f′(x)=−6x2.
Evaluate Derivative at x = 1: Evaluate the derivative at x=1.Substitute x=1 into the derivative f′(x)=−6x2.f′(1)=−6(1)2f′(1)=−6(1)f′(1)=−6
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