(Q4).Evaluate (-1)4

(-1)4

Can be written as (-1) × (-1) × (-1) × (-1)

FORMULA :

A

+

-

+

-

B

+

-

-

+

AB

=+

=+

=-

=-

Consider

A B A B
(-1) × (-1) × (-1) × (-1)

= +

(1) × (1) =

So it is