Question

how to write B= {x:x=n^2,n belongs to W and 4 11 years ago

Answer 1

it means x is such that x= n^2
and n is a whole number which lie between 4 and 8

Answer 2

whole numbers are
0 1 2 3 4 5 6 7 8 9 10 .............
sobetween 4 and 8 which vallues lies??

Answer 3

take those value of n one by one and put in
x=n^2
and calculate x