Cau 1: biet \(\frac{x}{2}=\frac{-y}{3}\) khi do \(\frac{\text{x}+2}{3-y}\)=
cau 2: cho tam giac ABC can tai A. duong cao AH bang 1 nua BC. vay BAC=.......
Cau 3: cho a,b,c la cac so khac 0 thoa man b^2=ac. khi do ta duoc\(\frac{a}{c}=\frac{\left(a+2014b\right)^n}{\left(b+2014c\right)}\)vay n=...........