If (m*n = (frac{m}{n} – frac{n}{m})) for m, n belong to R, evaluate -3*4
-
A.
(frac{-25}{12}) -
B.
(frac{-7}{12}) -
C.
(frac{7}{12}) -
D.
(frac{25}{12})
Correct Answer: Option C
Explanation
(m*n = frac{m}{n}-frac{n}{m}
= frac{-3}{4} – frac{4}{-3}
= frac{-3}{4} + frac{4}{3}
= frac{(-9+16)}{12}
= frac{7}{12})