# Help inequality proof

Can anyone help me prove this inequality?

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• 不等式.bmp
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$\int^\infty_0y^\frac{2(n-1)}{n}p(y)\,\mathrm{d}y\Big(\int^\infty_0y^\frac{1}{n}p(y)\,\mathrm{d}y\Big)^2>\int^\infty_0y^\frac{2}{n}p(y)\,\mathrm{d}y\Big(\int^\infty_0y^\frac{(n-1)}{n}p(y)\,\mathrm{d}y\Big)^2 \nonumber$
$p(y)>0$ and $\int^\infty_0p(y)\,\mathrm{d}y=1$ for any y
n is an integer and $n\ge2$