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数学
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当x取什么值时,分式x+3/4x-5(1)有意义(2)值等于0?
人气:403 ℃ 时间:2020-04-28 19:58:07
解答
(1)要使分式有意义,分母不能为0,即:
4x-5≠0,x≠5/4
(2)要使分式值等于0,只有分子为0,即:
x+3=0,x=-3
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