Q. Find the derivative of the following function.y=42x5Answer: y′=
Recognize composition of functions: First, we need to recognize that this is a composition of functions and we will need to use the chain rule to find the derivative. 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.
Find derivative of outer function: The outer function is 4u where u=2x5. The derivative of 4u with respect to u is 4u⋅ln(4) because the derivative of au is au⋅ln(a) where a is a constant.
Find derivative of inner function: The inner function is u=2x5. The derivative of u with respect to x is 10x4 because the derivative of xn is n⋅x(n−1).
Apply chain rule: Now we apply the chain rule by multiplying the derivative of the outer function by the derivative of the inner function. This gives us:y′=(42x5⋅ln(4))⋅(10x4)
Simplify final answer: Simplify the expression to get the final answer:y′=10x4⋅4(2x5)⋅ln(4)
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