(x2-x1)+ (x1-x2/x1x2) 怎样变形到(x2-x1)(1-1/x1x2)(x2-x1)+ x1-x2/x1x2 怎样变形到 (x2-x1)(1-1/x1x2)?
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(x2-x1)+(x1-x2/x1x2)怎样变形到(x2-x1)(1-1/x1x2)(x2-x1)+x1-x2/x1x2怎样变形到(x2-x1)(1-1/x1x2)?(x2-x1)+(x1-x2/x1
(x2-x1)+ (x1-x2/x1x2) 怎样变形到(x2-x1)(1-1/x1x2)(x2-x1)+ x1-x2/x1x2 怎样变形到 (x2-x1)(1-1/x1x2)?
(x2-x1)+ (x1-x2/x1x2) 怎样变形到(x2-x1)(1-1/x1x2)
(x2-x1)+ x1-x2/x1x2 怎样变形到 (x2-x1)(1-1/x1x2)?
(x2-x1)+ (x1-x2/x1x2) 怎样变形到(x2-x1)(1-1/x1x2)(x2-x1)+ x1-x2/x1x2 怎样变形到 (x2-x1)(1-1/x1x2)?
(x2-x1)+ x1-x2/x1x2 =(x2-x1)-x2-x1/x1x2=(x2-x1)(1-1/x1x2)
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(x2-x1)+ (x1-x2/x1x2) 怎样变形到(x2-x1)(1-1/x1x2)(x2-x1)+ x1-x2/x1x2 怎样变形到 (x2-x1)(1-1/x1x2)?
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