Q. Given the function y=4(x2+6x−6)4, find dxdy in any form.Answer: dxdy=
Apply Chain Rule: To find the derivative of the function y=4(x2+6x−6)4 with respect to x, we will use the chain rule. 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 (where u=x2+6x−6) and the inner function is x2+6x−6.
Differentiate Outer Function: First, we differentiate the outer function u4 with respect to u. The derivative of u4 is 4u3.
Differentiate Inner Function: Next, we differentiate the inner function x2+6x−6 with respect to x. The derivative of x2 is 2x, the derivative of 6x is 6, and the derivative of −6 is 0. So, the derivative of the inner function is 2x+6.
Apply Chain Rule Again: Now, we apply the chain rule by multiplying the derivative of the outer function by the derivative of the inner function. This gives us: (dxdy)=4u3×(2x+6).
Substitute Back Expression: We substitute back the expression for u to get the derivative in terms of x. So, dxdy=4(x2+6x−6)3⋅(2x+6).
Simplify Final Derivative: Finally, we can simplify the expression by distributing the 4 into the expression (x2+6x−6)3. This gives us the final derivative: (dxdy)=4×(2x+6)×(x2+6x−6)3.
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