Q. Find the derivative of the following function.y=ex5−6x4Answer: y′=
Identify Function Components: Identify the function and its components for differentiation.The function is y=ex5−6x4. This is an exponential function with a composite exponent.
Apply Chain Rule: Apply the chain rule for differentiation, which 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.The outer function is eu, where u=x5−6x4, and the inner function is u(x)=x5−6x4.
Derivative of Outer Function: Find the derivative of the outer function with respect to u, which is eu. The derivative of eu with respect to u is eu.
Derivative of Inner Function: Find the derivative of the inner function u(x)=x5−6x4 with respect to x. We will use the power rule, which states that the derivative of xn with respect to x is n⋅x(n−1).
Differentiate x5: Differentiate the first term of the inner function, x5. Using the power rule, the derivative of x5 is 5⋅x4.
Differentiate −6x4: Differentiate the second term of the inner function, −6x4.Using the power rule, the derivative of −6x4 is −24x3.
Combine Inner Function Derivatives: Combine the derivatives of the terms of the inner function to find the derivative of u(x).u′(x)=5x4−24x3.
Apply Chain Rule for y′: Apply the chain rule to find the derivative of y with respect to x. y′=(derivative of outer function evaluated at inner function)×(derivative of inner function). y′=ex5−6x4×(5x4−24x3).
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