Q. Given the function y=−(5x2+2x+1)4, find dxdy in any form.Answer: dxdy=
Identify Function: Identify the function to differentiate.We are given the function y=−(5x2+2x+1)4 and we need to find the derivative of this function with respect to x, which is denoted as dxdy.
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 u4 and the inner function is u=−(5x2+2x+1).
Differentiate Outer Function: Differentiate the outer function with respect to the inner function.Let u=−(5x2+2x+1). The derivative of u4 with respect to u is 4u3.
Differentiate Inner Function: Differentiate the inner function with respect to x. The derivative of u=−(5x2+2x+1) with respect to x is dxdu=−[2(5x)+2]=−10x−2.
Apply Chain Rule: Apply the chain rule by multiplying the derivatives from Step 3 and Step 4.(dxdy)=4u3⋅(dxdu)=4[−(5x2+2x+1)]3⋅(−10x−2).
Simplify Derivative: Simplify the expression for the derivative.dxdy=4[−(5x2+2x+1)]3∗(−10x−2)=−4(5x2+2x+1)3∗(10x+2).