有少少野唔係好明
1/x + 3/x+2 = 2
我知道個答案係x=1,-1
唔知個式點計
一條分式方程(5分)
2010-09-13 1:59 am
回答 (1)
2010-09-13 2:12 am
✔ 最佳答案
1/x + 3/(x+2) = 2[1/x + 3/(x+2)] * x(x+2) = 2 * x(x+2)(x+2) + 3x = 2x(x+2)4x + 2 = 2x^2 + 4x2x + 1 = x^2 + 2xx^2 - 1 = 0(x - 1)(x + 1) = 0x = 1 or x = - 1
收錄日期: 2021-04-21 22:19:57
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100912000051KK01262