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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:5 w) |( `" Y% k0 h/ H- f
冇答案ga....
$ w8 k' l' ]! {5 d0 A5 q: D+ A$ h0 j E9 z& U
2條equation solve 唔到3個unknown ga....
1 Y% F. O, p+ K4 u$ \agree
2 D; ^" D1 z9 H4 F# T$ S& U
5 N! t- t4 R6 A# m2 equations 2 unknows, n# k+ D$ m3 ~" L
2 K7 \+ T, O% j! aif 3 unknows there should be 3 equations , M! z' x7 g2 N, k2 U
7 @1 [2 o0 Y1 O& N# G Jmake it simple , G) C1 Y2 Z2 n
4 Z% `- _/ |; t; b% j& n4 w
say # G+ {/ d9 I( f4 v6 z/ B
% I/ t' n: W2 w- |: U4 o
a + b +c = 3
' G9 M3 T; D" E I- \
* t; w6 K2 _: u8 U: u* ], Na+b = 2
6 R5 B0 n8 F+ @
3 C2 o- H) S8 \1 X8 _# O7 }2 Cthen c is 1
% m2 `" n6 @4 h1 e( Q
! w9 B) D) @! \4 w) E0 F S; }a = 2 - b - s4 \3 Q& m/ V! }$ c4 D
4 a+ @9 d$ Y/ }7 _' aso 0 = 0 2 C4 V/ }7 @0 O. q& w
6 w: C+ V8 A% m, u/ L1 i1 w |
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