Question

Compute the following:
(i) $(-1{)}^{78}$ (ii) ${11}^3$

Answer 1

(i) $(-1{)}^{78}$

$=(-1{)}^{2\times 39}$

$=\left[\right(-1{)}^2{]}^{39}$

$=(1{)}^{39}$

$=1$

$\therefore (-1{)}^{78}=1$

(ii) $(11{)}^3$

$=11\times 11\times 11$

$=121\times 11$

$=1331$

$\therefore C(11{)}^3=1331$.