a/a-2-2a/a^2-2a-2/a,其中a等于3/2
答案:1 悬赏:30 手机版
解决时间 2021-02-15 16:19
- 提问者网友:箛茗
- 2021-02-15 08:48
a/a-2-2a/a^2-2a-2/a,其中a等于3/2
最佳答案
- 五星知识达人网友:琴狂剑也妄
- 2021-02-15 09:35
a/(a-2)-2a/(a²-2a)-2/a
=a²/[a(a-2)]-2a/[a(a-2)]-[2(a-2)]/[a(a-2)]
=[a²-2a-2(a-2)]/[a(a-2)]
=(a²-4a+4)/[a(a-2)]
=(a-2)²/[a(a-2)]
=(a-2)/a
=(3/2-2)/(3/2)
=-1/3
=a²/[a(a-2)]-2a/[a(a-2)]-[2(a-2)]/[a(a-2)]
=[a²-2a-2(a-2)]/[a(a-2)]
=(a²-4a+4)/[a(a-2)]
=(a-2)²/[a(a-2)]
=(a-2)/a
=(3/2-2)/(3/2)
=-1/3
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