Question

mn (2*1/mn+ (mm-1) *1/mn)​

Answer 1

Answer:

$mn(2 \times \frac{1}{mn} + ({mn - 1}) \times \frac{1}{mn} ) \\ = mn( \frac{1}{mn} (2 \times 1 + (mn - 1) \times 1) \\ = 2 + mn - 1 \\ = mn + 1$