问题描述:
⒈若X^2+Xy-2y^2=0则(X^2+3Xy+y^2)/X^2+y^2=?
⒉若根号-a—b—2又根号ab=根号-b—根号-a则ab关系?
⒊1/1+根号2+1/根号2+根号3+1/根号3+根号4+1/根号4+根号5+1/根号5+根号6=?
⒋3^2+4xy-y^2怎么解?
⒉若根号-a—b—2又根号ab=根号-b—根号-a则ab关系?
⒊1/1+根号2+1/根号2+根号3+1/根号3+根号4+1/根号4+根号5+1/根号5+根号6=?
⒋3^2+4xy-y^2怎么解?
问题解答:
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