Q. Find the derivative of the following function.y=ex3+4x2Answer: y′=
Identify Function Components: Identify the function and its components.We have y=ex3+4x2. The outer function is eu, where u is the inner function u(x)=x3+4x2.
Derivative of Outer Function: Find the derivative of the outer function with respect to u. The derivative of eu with respect to u is eu.
Derivative of Inner Function: Find the derivative of the inner function u(x)=x3+4x2 with respect to x. Using the power rule, the derivative of x3 is 3x2, and the derivative of 4x2 is 8x. So, u′(x)=dxd(x3+4x2)=3x2+8x.
Apply Chain Rule: Apply the chain rule to find the derivative of y with respect to x. 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. So, y′=(dud(eu))⋅(dxd(u(x)))=ex3+4x2⋅(3x2+8x).
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