以后你看到1/（x-1）（x-2）=1/（x-2）-1/（x-1）,其余类似
1/x-1+1/(x-1)(x-2)+1/(x-2)(x-3)+1/(x-3)(x-4)+1/(x-4)(x-5)
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相关问题
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1/(x+1)(x+2) + 1/(x+2)(x+3) + 1/(x+3)(x+4) + 1/(x+4)(x+5)
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1x2=1/3(1x2x3=0x1x2 ) 2x3=1/3(2x3x4-1x2x3) 3x4=1/3(3x4x5- 2x
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1x2=1|3(1x2x3-0x1x2) 2x3=1|3(2x3x4-1x2x3) 3x4=1|3(3x4x5-2x3x
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x1+5x2-x3-x4=-1x1-2x2+x3+3x4=33x1+8x2-x3+x4=1
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1+1x2+1x2x3+1x2x3x4.+1x2x3x4x5x6=?
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X-(1/4+3)-1/3{(X-1/4X+3)}-2-1/2{X-(X-1/4X+3)-1/3(X+1/4X+3)-2
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3（x+2）/x-3+ x+3/x-2=4 1/x+1 + 2x/x+1=2 5x/x+2 + 3/x^2+4x+4=5
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化简：[1(x+1)(x+2)+1(x+2)(x+3)+1(x+3)(x+4)+1(x+4)(x+5)．
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化简：[1(x+1)(x+2)+1(x+2)(x+3)+1(x+3)(x+4)+1(x+4)(x+5)．
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化简：[1(x+1)(x+2)+1(x+2)(x+3)+1(x+3)(x+4)+1(x+4)(x+5)．