To find the maximum of \(f(y)\) on \( (0,1] \), take the derivative:
![To find the maximum of \(f(y)\) on \( (0,1] \), take the derivative:](https://soloferat.biz.id/images/to-find-the-maximum-of-fy-on--01--take-the-derivative.jpg)
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- f'(y) = 4 \cdot \frac{(1)(y^2) - (1 + y)(2y)}{y^4} = 4 \cdot \frac{y^2 - 2y(1 + y)}{y^4} = 4 \cdot \frac{y^2 - 2y - 2y^2}{y^4} = 4 \cdot \frac{-y^2 - 2y}{y^4} = -4 \cdot \
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