Apply Power Rule: To find the derivative of x45 with respect to x, we will use the power rule for differentiation, which states that if f(x)=xn, then f′(x)=n⋅xn−1.
Calculate Derivative: Applying the power rule to x5/4, we get f′(x)=45⋅x(45−1)=45⋅x1/4.
Substitute x=16: Now we need to evaluate the derivative at x=16. So we substitute x with 16 in the derivative we found: f′(16)=(45)⋅1641.
Find Fourth Root: To simplify 161/4, we need to find the fourth root of 16. The fourth root of 16 is 2 because 24=16.
Substitute in Derivative: Substitute 161/4 with 2 in the derivative: f′(16)=45⋅2.
Final Derivative Value: Now we multiply (45) by 2 to get the final value of the derivative at x=16: f′(16)=(45)⋅2=25.
More problems from Operations with rational exponents