ma-m n-nx
------ x --------
xb-b ac-c
=?
急!! 數學題1題
2007-01-10 1:02 am
回答 (7)
2007-01-10 1:08 am
✔ 最佳答案
ma - m n - nx----------- x ----------
xb - bac - c
m(a - 1)n(1 - x)
= ------------ x ------------
b(x - 1) c(a - 1)
m- n
= ----- x----
bc
mn
= -----
bc
2007-01-10 2:23 am
[ (ma - m) / (xb - b) ] * [ (n - nx) / (ac - c) ]
= [ ma - m) * n - nx) ] / [ xb - b) * ac - c) ]
= [ m(a - 1) * n(1 - x) ] / [ b(x - 1) * c(a - 1) ]
= [ mn(a - 1)(1 - x) ] / [ bc(x - 1)(a - 1) ]
= [ -mn(a - 1)(x - 1) ] / [ bc(a - 1)(x - 1) ]
= -mn/bc
= [ ma - m) * n - nx) ] / [ xb - b) * ac - c) ]
= [ m(a - 1) * n(1 - x) ] / [ b(x - 1) * c(a - 1) ]
= [ mn(a - 1)(1 - x) ] / [ bc(x - 1)(a - 1) ]
= [ -mn(a - 1)(x - 1) ] / [ bc(a - 1)(x - 1) ]
= -mn/bc
2007-01-10 1:23 am
_mn__
= -- bc
= -- bc
2007-01-10 1:21 am
ma - m n - nx
----------- X ----------
xb - bac - c
m (a - 1)n(1 - x)
= ------------ X ------------
b(x - 1) c(a - 1)
m n
= ----- X (- ----)
b c
m X n
= ------------
b X c
mn
= - -----
bc
2007-01-09 17:23:57 補充：
The answer is: = -mn/bc
----------- X ----------
xb - bac - c
m (a - 1)n(1 - x)
= ------------ X ------------
b(x - 1) c(a - 1)
m n
= ----- X (- ----)
b c
m X n
= ------------
b X c
mn
= - -----
bc
2007-01-09 17:23:57 補充：
The answer is: = -mn/bc
2007-01-10 1:12 am
ma-m n-nx
------ x --------
xb-b ac-c
=m(a-1) n(1-x)
------ x --------
b(x-1) c(a-1)
= m n(1-x)
-------x-----------
b(x-1) c
= m -n
------x-------
b c
= mn
- -----
bc
------ x --------
xb-b ac-c
=m(a-1) n(1-x)
------ x --------
b(x-1) c(a-1)
= m n(1-x)
-------x-----------
b(x-1) c
= m -n
------x-------
b c
= mn
- -----
bc
2007-01-10 1:09 am
= (ma-m)(n-nx)/(xb-b)(ac-c)
= [m(a-1)][n(1-x)]/[b(x-1)][c(a-1)]
= [m(a-1)][-n(x-1)]/[b(x-1)][c(a-1)] 約左
= -mn/bc
= [m(a-1)][n(1-x)]/[b(x-1)][c(a-1)]
= [m(a-1)][-n(x-1)]/[b(x-1)][c(a-1)] 約左
= -mn/bc
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https://hk.answers.yahoo.com/question/index?qid=20070109000051KK02251