已知实数a,b,c满足a>b>c,且a+b+c=0.若x1,x2为方程ax2+b 发布时间:2017-05-08 19:26 │ 来源:www.tikuol.com 题型:填空题 问题: 已知实数a,b,c满足a>b>c,且a+b+c=0.若x1,x2为方程ax2+bx+c=0的两个实数根,则|x21-x22|的取值范围为______.
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题型:填空题 —Where did you go last week? —I went to Zhang Aiping's hometown and visited the house ______ he was born in. [ ]A. that B. there C. who D. whose 查看答案