Question

Find the sum of additive inverse and multiplicative inverse of 7.

Answer 1

The additive inverse of $7=-7$...(0.5 marks)
The multiplicative inverse of $7=\frac{1}{7}$...(0.5 marks)
$\therefore$ Required sum $=-7+\frac{1}{7}=\frac{-49+1}{7}$...(0.5 marks)
$=\frac{-48}{7}=-6\frac{6}{7}$...(0.5 marks)