Find First Derivative: To find the second derivative of y with respect to x, we first need to find the first derivative using 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 and the inner function is u=3x−2.
Simplify First Derivative: First, we differentiate u4 with respect to u to get 4u3. Then we differentiate the inner function 3x−2 with respect to x to get 3. Applying the chain rule, we multiply these two results to get the first derivative of y with respect to x: dxdy=4×(3x−2)3×3.
Find Second Derivative: Now we simplify the first derivative: dxdy=12×(3x−2)3.
Apply Chain Rule Again: Next, we need to find the second derivative, which is the derivative of the first derivative. We will again use the chain rule. This time, the outer function is v3 where v=3x−2, and the inner function is still 3x−2.
Substitute Back into Expression: Differentiating v3 with respect to v gives us 3v2. Differentiating the inner function 3x−2 with respect to x again gives us 3. Applying the chain rule to the first derivative, we get the second derivative: dx2d2y=3×3v2×3.
Simplify Second Derivative: Substitute v=3x−2 back into the expression for the second derivative: dx2d2y=3×3×(3x−2)2×3.
Simplify Second Derivative: Substitute v=3x−2 back into the expression for the second derivative: dx2d2y=3×3×(3x−2)2×3.Now we simplify the second derivative: dx2d2y=27×(3x−2)2.
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