Q. Find the derivative of the following function.y=3x3Answer: y′=
Identify Function: Identify the function to differentiate.We are given the function y=3x3. We need to find its derivative with respect to x, which is denoted as y′.
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 3u (where u=x3) and the inner function is u=x3.
Differentiate Outer Function: Differentiate the outer function with respect to the inner function.The derivative of 3u with respect to u is 3u⋅ln(3), where ln(3) is the natural logarithm of 3.
Differentiate Inner Function: Differentiate the inner function with respect to x. The derivative of u=x3 with respect to x is 3x2.
Apply Chain Rule: Apply the chain rule by multiplying the derivatives from Step 3 and Step 4.y′=(3u⋅ln(3))⋅(3x2)Since u=x3, we substitute back to get:y′=(3x3⋅ln(3))⋅(3x2)
Simplify Derivative: Simplify the expression for the derivative.y′=3x3⋅ln(3)⋅3x2y′=3x2⋅ln(3)⋅3x3
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