题目内容
当x取什么值时,下列分式有意义?
(1)
______;
(2)
______;
(3)
______;
(4)
______.
(1)
2 |
x |
(2)
x |
2x-3 |
(3)
x-1 |
x+2 |
(4)
5x |
x2+1 |
(1)由题意得x≠0;
(2)由题意得:2x-3≠0,解得x≠
;
(3)由题意得:x+2≠0,
解得x≠-2;
(4)由题意得:x2+1≠0,
x为任何实数.
(2)由题意得:2x-3≠0,解得x≠
3 |
2 |
(3)由题意得:x+2≠0,
解得x≠-2;
(4)由题意得:x2+1≠0,
x为任何实数.
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