Question

Verify that -(-x) =x, when x (a) 7/6,(b) -8/9

Answer 1

a)

when x = 7/6

- ( - x ) = - { - ( 7/6 ) }

= 7/6

&

b)

when x = -8/9

- ( -x ) = - { - ( -8/9 ) }

= - { 8/9 }

= -8/9

hence

- ( - x ) = x