Q. Given the function f(x)=(8x−6)6, find f′(x) in any form.Answer: f′(x)=
Identify Function: Identify the function to differentiate.We are given the function f(x)=(8x−6)6. We need to find its derivative, denoted as f′(x).
Apply Chain Rule: Apply the chain rule for differentiation.The chain rule states that the derivative of a composite function is the derivative of the outer function evaluated at the inner function times the derivative of the inner function. In this case, the outer function is u6 and the inner function is u=8x−6.
Differentiate Outer Function: Differentiate the outer function with respect to the inner function.The derivative of u6 with respect to u is 6u5. We will substitute u back with 8x−6 later.
Differentiate Inner Function: Differentiate the inner function with respect to x. The derivative of 8x−6 with respect to x is 8, since the derivative of a constant is 0 and the derivative of 8x is 8.
Combine Using Chain Rule: Combine the results using the chain rule.Now we multiply the derivative of the outer function by the derivative of the inner function: f′(x)=6(8x−6)5×8.
Simplify Expression: Simplify the expression.We can simplify the expression by multiplying 6 and 8 together: f′(x)=48(8x−6)5.
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