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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:" s7 \/ ?4 P7 }& q: l
冇答案ga....
& R9 ^; |+ c# g% w! H
- o9 f4 h' d c: J3 c3 i2條equation solve 唔到3個unknown ga....
* ~+ T" T. _! Q' J& i3 K# I1 }agree # ` q3 U- O3 |3 S: k" W
( Y+ f8 B/ R# u+ Z& V# ?/ b" |2 equations 2 unknows
0 H0 x G9 l5 d7 L1 t) S2 C" C: W) m7 \1 Z
if 3 unknows there should be 3 equations - b- ~0 @& ?4 j6 ?
' ?4 g* u5 D+ l5 W) Pmake it simple
! v1 n9 W3 ^) j+ H
- _! j( V `* {) d I( `say 4 `' x! Z& M+ m) Q
% R* @0 B4 ~ l% s
a + b +c = 3: \6 S( ?5 D2 l8 {( W3 @
( a" t$ h6 W7 ^/ h4 V4 v
a+b = 21 d; S X9 Q: v# a
, I; ], b* f8 _1 o7 a e, K6 bthen c is 1
( Z# z- y9 ~5 O' z/ Y
6 ?* r4 P" o8 `/ L { Na = 2 - b " m# e- I( X. Z5 U9 B/ n
8 F) M" H, J, b! @" V' A* l2 ^. k/ E% kso 0 = 0 " n# Y6 v+ L1 N% X. E: _8 O5 }! l
. ~/ ]7 i ]2 d+ _ |
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