請解答以下的math題,需寫步驟
1.) 1/a+1/b=b/a [a]
2.) y=2x/x-2 [x]
3.) y=3x+1/x-1 [x]
請解答方程
2006-10-14 5:09 am
回答 (1)
2006-10-14 5:15 am
✔ 最佳答案
1.) 1/a+1/b=b/a [a]1/a - b/a = - 1/b
(1-b) b = - a
a = b (b-1)
2.) y=2x/x-2 [x]
y (x-2) = 2x
xy - 2y = 2x
x (y-2) = 2y
x = 2y / (y-2)
3.) y=3x+1/x-1 [x]
xy -y = 3x + 1
x (y-3) = y + 1
x = (y+1)/(y-3)
收錄日期: 2021-04-13 15:55:19
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https://hk.answers.yahoo.com/question/index?qid=20061013000051KK04036