Question

Mark the correct alternatives in each of the following:

The additive inverse of −7 is

(a) −7 (b) $-\frac{1}{7}$ (c) 7 (d) $\frac{1}{7}$

Answer 1

We know that, for every integer a, there exists integer −a such that

a + (−a) = 0 = −a + a

Here, −a is the additive inverse of a and a is the additive inverse of −a.

Now, 7 + (−7) = 0 = −7 + 7

∴ 7 is the additive inverse of −7.

Hence, the correct answer is option (c).