Question

SETS: U:{3,6,9,12,15,18,21,24}
It's subset A:{6,12,18,24} Verify that:(A`)`=A

Answer 1

Hi ,

U = { 3,6,9,12,15,18,21,24}

A = { 6,12,18,24 }

A' = U - A

= { 3,6,9,12,15,18,21,24}-{6,12,18,24}

= { 3,9,15,21 } ----( 1 )

( A')' = U - A'

= { 3,6,9,12,15,18,21,24}-{3,9,15,21}

= { 6,12,18,24 }

= A

Therefore ,

( A' )' = A

I hope this helps you.

:)