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發表於 2008-1-18 08:56 AM
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Originally posted by cutec at 2008-1-18 08:26 AM:! E; A. H- Q3 P. H6 K H
冇答案ga....
3 A$ N; _# _4 {4 h
h) c: M5 J% q2條equation solve 唔到3個unknown ga....
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agree
- u4 J2 a- a- T1 t6 l; j8 j0 }. U
2 equations 2 unknows
, D$ S" P' p! K x$ i- o2 `. ] e0 q _; ?1 \
if 3 unknows there should be 3 equations
3 L- R* J, N7 @+ i3 X
( y$ {$ ?" n0 \) Fmake it simple - U/ }/ g& b! K, u# D7 R
6 N) T9 Y% `0 j& o/ t7 nsay
1 L8 J/ A1 k+ k6 h4 y9 J6 z( c3 ^! Z( j, `
a + b +c = 38 F" F! O/ ^5 k' w
# I( B+ l( ^( {6 G& _a+b = 2
1 A- C* L# m% j4 @+ D1 i5 }; `* R. D! c
then c is 1 . h I" L4 t2 K. d" |- j) c
( K. i4 t7 s1 |( x% u" Oa = 2 - b
% J7 c: U, A6 e. l( j. H' m7 a! H1 q, {) E5 y3 K' z; O3 T8 J
so 0 = 0
1 ?, S4 Z4 j5 P
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