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Freshman's math problem
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Then, f (x) =1√ (1-x 2)-2ax.

Integrate the above formula in [0, 1] to get: ∫ < 0,1> f(x)dx =∫& lt; 0, 1 & gt; [ 1/√( 1-x^2)-2ax]dx

= = = & gta =∫& lt; 0, 1 & gt; 【 1/√( 1-x^2)]dx-∫<; 0, 1 & gt; 2axdx

= = = & gta =[arcsinx]| & lt; 0, 1 & gt; -a[x^2]|<; 0, 1 & gt;

= = = & gta=[(π/2)-0]-a*[ 1-0]

= = = & gta=(π/2)-a

= = = & gta=π/4

So f (x) =1√ (1-x 2)-(π/2) x.