Q. Find the derivative of the following function.y=log2(−9x3)Answer: y′=
Identify Function: Identify the function and its components.We are given y=log2(−9x3), which is a logarithmic function with base 2. We need to find the derivative of this function with respect to x.
Apply Rule: Apply the logarithmic differentiation rule.The derivative of logb(u) with respect to x is (1/u)⋅(du/dx)⋅(1/log(b)), where u is a function of x and b is the base of the logarithm. In our case, u=−9x3 and b=2.
Differentiate Inner Function: Differentiate the inner function u=−9x3 with respect to x. The derivative of u with respect to x is dxdu=dxd(−9x3)=−27x2.
Substitute Derivative: Substitute the derivative of u into the differentiation formula.Using the result from Step 3, we substitute dxdu into the formula from Step 2 to get y′=((−9x3)1)∗(−27x2)∗(log(2)1).
Simplify Expression: Simplify the expression.We can simplify the expression by multiplying the terms together. This gives us y′=−9x3−27x2×log(2)1=x3×log(2)1.
Check for Errors: Check for any mathematical errors.There are no mathematical errors in the previous steps. The derivative has been correctly calculated.
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