因为a不等于b,
所以A、B是T^2+2T-2=0的两根
所以A+B=-2;AB=-2
(友情提示:若没有“A不等于B”这个条件,则需分类讨论)
已知实数ab满足a^2+2a=2,b^2+2b=2,且a≠b,求a+b、ab的值
已知实数ab满足a^2+2a=2,b^2+2b=2,且a≠b,求a+b、ab的值
数学人气:942 ℃时间:2020-02-04 02:04:54
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