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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:
) r9 g' B/ r+ a7 w! F8 k冇答案ga....' t; j. Q* z9 K0 ?5 z4 n
% P& {2 f( b7 T! ~4 f1 X- d- e+ {2條equation solve 唔到3個unknown ga....
agree
3 }, |1 ~( ` w0 X. i/ X( h
6 \, I" `4 E' R* G; p+ L2 equations 2 unknows* V7 e6 w T" M; D7 Z
& V4 M+ s2 h$ V0 \1 ~: n' v& Rif 3 unknows there should be 3 equations ( V5 I- }$ g7 i) d
) Z+ P7 g( `8 g. R/ m- Zmake it simple
) t/ X1 M: V: R0 g: Q0 J* V/ n8 K
0 R6 I; a# ^; \' E( i( ysay
) C W- f/ p- r% R* P1 j2 g5 f
* a b) f, s* W6 y9 Z3 ba + b +c = 3
; @3 ]- G' V, B6 K* Y: n
- w. \9 D- s5 K4 I( g) J0 ?. h( a8 ga+b = 2+ s1 p7 i, e* d/ N
! N" x5 v( d7 G/ D' C6 {/ Nthen c is 1
9 J# ^/ I! d2 x- G- b& I7 _- Z) M& S+ P# z1 l$ Q. X
a = 2 - b " i7 ~* b4 \+ x* a) J0 v
# B x6 a D7 K0 s8 i9 W& \so 0 = 0 0 u& C1 p' E: R7 e/ u
8 K6 t! }4 o( ~0 B, |4 r0 g
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