Q. Find the derivative of the following function.y=log3(−8x6−6x5)Answer: y′=
Identify Function & Derivative Type: Identify the function and the type of derivative to be found.We need to find the derivative of the function y=log3(−8x6−6x5) with respect to x. This is a logarithmic differentiation problem where the base of the logarithm is 3.
Apply Logarithmic Differentiation Rule: Apply the logarithmic differentiation rule.The derivative of logb(u) with respect to x is (u1)⋅(dxdu)⋅(log(b)1), where u is a function of x and b is the base of the logarithm. In our case, u=−8x6−6x5 and b=3.
Differentiate Inside Function: Differentiate the inside function u=−8x6−6x5 with respect to x. Using the power rule, the derivative of u with respect to x is dxdu=−8×6x6−1−6×5x5−1=−48x5−30x4.
Substitute Derivative into Formula: Substitute the derivative of u into the differentiation formula.Now we have dxdu=−48x5−30x4, and we can substitute this into the formula from Step 2 to get the derivative of y with respect to x.y′=(−8x6−6x5)1⋅(−48x5−30x4)⋅log(3)1
Simplify Expression: Simplify the expression.We can simplify the expression by multiplying the terms together. However, we must be careful with the negative sign in the denominator.y′=(−8x6−6x5)⋅log(3)−48x5−30x4
Factor Out Common Terms: Factor out common terms if possible.In this case, we can factor out an x4 from the numerator and denominator to simplify the expression further.y′=x4(−8x2−6x)⋅log(3)x4(−48x−30)y′=(−8x2−6x)⋅log(3)−48x−30
Check for Simplifications: Check for any possible simplifications or cancellations. There are no further simplifications or cancellations that can be made in this expression. Therefore, the final derivative is: y′=(−8x2−6x)⋅log(3)−48x−30
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