Q. Find the derivative of the following function.y=log2(2x2+2x)Answer: y′=
Apply Chain Rule: First, we need to apply the chain rule for derivatives, 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 here is log2(u), and the inner function is u=2x2+2x.
Differentiate log2(u): To differentiate log2(u) with respect to u, we use the formula dxd[log2(u)]=(uln(2))1. This is because the derivative of log base a of u is (uln(a))1, where ln denotes the natural logarithm.
Find Derivative of Inner Function: Now we need to find the derivative of the inner function u=2x2+2x with respect to x. Using the power rule, the derivative of x2 is 2x, and the derivative of x is 1. Therefore, the derivative of u with respect to x is dxdu=2(2x)+2(1)=4x+2.
Combine Results: Combining the results from the previous steps, we get the derivative of y with respect to x as y′=(2x2+2xln(2))1⋅(4x+2).
Simplify Expression: We can simplify the expression by factoring out 2 from the numerator and denominator. This gives us y′=2(2x2+2x)ln(2)2(2x+1)=(2x2+2x)ln(2)2x+1.
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