Hệ phương trình \(\left\{{}\begin{matrix}ax+by=c\\a'x+b'y=c'\end{matrix}\right.\) có nghiệm duy nhất khi
A.\(\dfrac{a}{a'}=\dfrac{b}{b'}\) B.\(\dfrac{b}{b'}\ne\dfrac{c}{c'}\) C.\(\dfrac{a}{a'}=\dfrac{b}{b'}\ne\dfrac{c}{c'}\) D.\(\dfrac{a}{a'}\ne\dfrac{b}{b'}\)
\(\dfrac{a}{a'}\ne\dfrac{b}{b'}\\ =>D\)
Chọn D