Q. Find the derivative of the following function.y=log5(6x2+2x)Answer: y′=
Identify Function and Derivative Type: Identify the function and the type of derivative to be found.We need to find the derivative of the function y=log5(6x2+2x) with respect to x. This is a logarithmic differentiation problem where the base of the logarithm is 5.
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. For the logarithmic function y=log5(u), where u=6x2+2x, the derivative with respect to x is (1/u)⋅(du/dx).
Differentiate Inner Function: Differentiate the inner function u=6x2+2x with respect to x. The derivative of u with respect to x is dxdu=dxd(6x2)+dxd(2x)=12x+2.
Apply Change of Base Formula: Apply the change of base formula for logarithms. The change of base formula is logb(a)=logc(b)logc(a). We can use this to convert the base 5 logarithm to a natural logarithm: log5(u)=ln(5)ln(u).
Combine Results for Derivative: Combine the results from Steps 2, 3, and 4 to find the derivative of y. Using the chain rule and the change of base formula, the derivative of y with respect to x is y′=(6x2+2x)1⋅ln(5)(12x+2).
Simplify Derivative Expression: Simplify the expression for the derivative. y′=(6x2+2x)⋅ln(5)12x+2.This is the simplified form of the derivative.
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