Q. Find the derivative of the following function.y=ex2−9xAnswer: y′=
Identify Function: Identify the function to differentiate.We are given the function y=ex2−9x. We need to find its derivative with respect to 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 eu, where u=x2−9x, and the inner function is u(x)=x2−9x.
Differentiate Outer Function: Differentiate the outer function with respect to the inner function.The derivative of eu with respect to u is eu. So, the derivative of ex2−9x with respect to x2−9x is ex2−9x.
Differentiate Inner Function: Differentiate the inner function with respect to x. The derivative of u(x)=x2−9x with respect to x is 2x−9.
Apply Chain Rule Multiplication: Apply the chain rule by multiplying the derivatives from Step 3 and Step 4.The derivative of y with respect to x is the product of the derivative of the outer function and the derivative of the inner function. Therefore, y′=e(x2−9x)⋅(2x−9).
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