Q.

The equations

ax – (a + b) y = 1

and

(a – b) x + ay = 5

have a unique solution ….

A. … for all value of a and b

B. … only when \(a = b\)

C. … only when \(^ : ^ \neq 1 : 2\)

D. … only when a = 0 and b = 0

E.  … only when \(a \neq b\)

C. Only when \(^ : ^ \neq 1 : 2\)

\(\frac \neq -\frac\)

\(^ \neq [^ – ^]\)

\(2^ \neq ^\)

\(\frac{^}{^} \neq \frac\)