题目内容
若
且
，求x，y的值．
且，求x，y的值．解：∵x，y≠ 0，∴xy≠ 0，
∴lg(xy)=0，∴xy=1，······································································ 3分
即为{x，1，0}={0，|x|，y}，若y=1，则x=1，不合题意，·························· 5分
∴
····················································································· 7分
解得：
（舍去），
，······················································· 8
分
∴x=-1，y=-1．············································································· 9分
∴lg(xy)=0，∴xy=1，······································································ 3分
即为{x，1，0}={0，|x|，y}，若y=1，则x=1，不合题意，·························· 5分
∴
····················································································· 7分解得：
（舍去），，······················································· 8分∴x=-1，y=-1．············································································· 9分
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