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Let 
y=(3x-2)^(4).
Find 
(d^(2)y)/(dx^(2)).

(d^(2)y)/(dx^(2))=

Let y=(3x2)4 y=(3 x-2)^{4} .\newlineFind d2ydx2 \frac{d^{2} y}{d x^{2}} .\newlined2ydx2= \frac{d^{2} y}{d x^{2}}=

Full solution

Q. Let y=(3x2)4 y=(3 x-2)^{4} .\newlineFind d2ydx2 \frac{d^{2} y}{d x^{2}} .\newlined2ydx2= \frac{d^{2} y}{d x^{2}}=
  1. Find First Derivative: To find the second derivative of yy with respect to xx, 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 u4u^4 and the inner function is u=3x2u = 3x - 2.
  2. Simplify First Derivative: First, we differentiate u4u^4 with respect to uu to get 4u34u^3. Then we differentiate the inner function 3x23x - 2 with respect to xx to get 33. Applying the chain rule, we multiply these two results to get the first derivative of yy with respect to xx: dydx=4×(3x2)3×3\frac{dy}{dx} = 4 \times (3x - 2)^3 \times 3.
  3. Find Second Derivative: Now we simplify the first derivative: dydx=12×(3x2)3\frac{dy}{dx} = 12 \times (3x - 2)^3.
  4. 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 v3v^3 where v=3x2v = 3x - 2, and the inner function is still 3x23x - 2.
  5. Substitute Back into Expression: Differentiating v3v^3 with respect to vv gives us 3v23v^2. Differentiating the inner function 3x23x - 2 with respect to xx again gives us 33. Applying the chain rule to the first derivative, we get the second derivative: d2ydx2=3×3v2×3\frac{d^2y}{dx^2} = 3 \times 3v^2 \times 3.
  6. Simplify Second Derivative: Substitute v=3x2v = 3x - 2 back into the expression for the second derivative: d2ydx2=3×3×(3x2)2×3\frac{d^2y}{dx^2} = 3 \times 3 \times (3x - 2)^2 \times 3.
  7. Simplify Second Derivative: Substitute v=3x2v = 3x - 2 back into the expression for the second derivative: d2ydx2=3×3×(3x2)2×3\frac{d^2y}{dx^2} = 3 \times 3 \times (3x - 2)^2 \times 3.Now we simplify the second derivative: d2ydx2=27×(3x2)2\frac{d^2y}{dx^2} = 27 \times (3x - 2)^2.