Question

d=(1,2,4,7,14,28) in set roster form

Answer 1

{x:x is the sum of previous numbers} that is 1

Answer 2

Hi ,

D = { 1 , 2 , 4 , 7 , 14 , 28 }

set builder form of D

D = { x / x is factor of 28 }

I hope this helps you.

:)