Q. For the following equation, evaluate f′(1).f(x)=2x5+x2−3Answer:
Apply Power Rule: To find the derivative of the function f(x)=2x5+x2−3, we need to apply the power rule to each term where the power rule states that the derivative of xn is n⋅x(n−1).
Derivative of 2x5: Applying the power rule to the first term: The derivative of 2x5 is 5⋅2x5−1=10x4.
Derivative of x2: Applying the power rule to the second term: The derivative of x2 is 2⋅x2−1=2x.
Derivative of constant: The third term is a constant, −3, and the derivative of a constant is 0.
Combine derivatives: Combining the derivatives of all terms, we get the derivative of the function f(x): f′(x)=10x4+2x.
Substitute x=1: Now we need to evaluate the derivative at x=1. Substitute x with 1 in f′(x)=10x4+2x.
Evaluate f′(1): Evaluating the derivative at x=1: f′(1)=10(1)4+2(1)=10+2.
Simplify final value: Simplify the expression to find the final value: f′(1)=10+2=12.
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