|
- 帖子
- 800
- 精華
- 0
- 威望
- 26
- 魅力
- 45
- 讚好
- 0
- 性別
- 男
|
1#
發表於 2008-1-18 08:56 AM
| 顯示全部帖子
Originally posted by cutec at 2008-1-18 08:26 AM:1 S) a& G) [' N
冇答案ga...., \* ]5 R0 }. K" p2 a; L/ e5 m+ e
) ^. t& T7 x8 p+ z- L$ i2條equation solve 唔到3個unknown ga....
agree
: v7 X8 n/ O$ o3 z& ^6 C* Q
2 |6 i0 t# g: I: t, n% }; M2 equations 2 unknows. C7 A% W% F% q# H# G
) w6 u! L/ r) N
if 3 unknows there should be 3 equations 9 x$ @ o0 f; a. [" o
% g$ r- D! d; z5 z2 ?make it simple % a9 r5 r4 j7 a0 X
3 u# f5 g' X$ T- T5 M9 N5 b1 J
say
' B) V6 R, j% ^6 r. {9 v- \& I4 S' S0 R+ R7 H- k: |$ r
a + b +c = 3/ f# W$ {- K+ B4 U
, N: k8 Q A0 [: |a+b = 2
* u6 J5 K7 H' M, |1 Q, O1 c8 v
/ m1 w0 ~0 B6 E2 E# athen c is 1 7 T8 p4 [% w1 G7 g
( ]4 a+ h1 W3 V' p& z
a = 2 - b % L6 u1 u4 d2 \, o! a
# W* r1 \, X0 Q2 }2 C% v2 W
so 0 = 0 $ [' v. N2 c& S+ ]; G
3 {; P; @' l) q# a6 [
 |
|
