Question

candy

這題要如何計算？

X = 2 4 1 Y = 3
3. # ABC #. # (a+1)ĀB+(2a -b)BC +(a+b+2)TA= 7
求ab的值
.
1
AAB TAB + Zabc-bbc tacat GEA+ZCA = ă
alABT ZBC TEX) = 0
- (BC-CA) = 0
AB
- 48 -