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X2 x 2 x 1
X2 x 2 x 1 pictures 5
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X2 x
X2 x 2 x 1
e x x2 1 )/( x 1 2
integrate x2 x 1 /( x 2 )( x2 1
x x2 2x 1 )u003d 2 x 1
x 1 x 2 then x2 1 x2
f x )u003d x2 x 2 x 1
x3 x2 x 2 x 1
3 4x x2 /( x 2 )( x 1
x2 x 2 /( x 1 2 3
x2 x 2 x 1 0
x2 x 2 x 1
