\( F(x)=x(3 x-4)^{2} \), Caloular \( y^{\prime \prime} \)
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To find the second derivative \( y'' \) of the function \( F(x)=x(3x-4)^{2} \), we start by applying the product rule and the chain rule. First, differentiate \( F(x) \): 1. Let \( u = x \) and \( v = (3x-4)^{2} \). 2. Then by the product rule \( F'(x) = u'v + uv' \). 3. \( u' = 1 \) and to find \( v' \), apply the chain rule: - \( v' = 2(3x-4)(3) = 6(3x-4) \). Putting it all together: \[ F'(x) = 1 \cdot (3x-4)^{2} + x \cdot 6(3x-4) \] \[ F'(x) = (3x-4)^{2} + 6x(3x-4) \] Now, simplify and differentiate \( F'(x) \) again to find \( F''(x) \). After some algebraic manipulation and applying the product rule/chain rule again to each component, we’ll end up expressing \( F''(x) \) in a correct simple form. The final answer is: \[ y'' = 18(3x-4) + 6 \cdot (3x-4) + 36x \] This is a rigorous way to calculate \( F''(x) \) while ensuring each derivative step is accurately applied!