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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:- o6 E1 z; T w$ }0 r5 V5 {- ^6 F
冇答案ga....
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^: O& o' l, k3 E4 s2條equation solve 唔到3個unknown ga....
( Q8 V9 k. k& R) ]& m5 y
agree
% S6 X/ z1 g% p" x5 G, N5 b* _5 g( r7 J i6 w! u
2 equations 2 unknows" `6 L: s9 r* L
, D! ~9 q1 j0 `if 3 unknows there should be 3 equations ' C4 s7 y- L! ]$ i
- q2 d$ b$ }: T7 bmake it simple - b% B4 v3 A- A9 q# d- I( k
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say
0 V; b' u! d, b& T
- D ~+ ~0 d: d: }a + b +c = 31 b1 \* m1 n9 A$ m
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a+b = 2
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then c is 1
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& x# f! L; j$ j% da = 2 - b
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& t2 ~& n5 a- R9 w* b* G5 hso 0 = 0
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