If m * n = [mn − nm] for m, n belong to R, ..

Question 1 Report

If m * n = [mn − nm] for m, n belong to R, evaluate − 3 * 4

Answer Details

m * n = $\frac{m}{n}$ - $\frac{m}{n}$
m = − 3
n = 4
∴ − 3 × 4 = $\frac{- 3}{4}$ - $\frac{- 4}{- 3}$
= $\frac{3 (- 3) - (- 4 \times 4)}{12}$
= $\frac{- 9 + 16}{12}$
= $\frac{7}{12}$

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