Question

B = {3, 6, 9, 12} in 'set Builder form
is​

Answer 1

Answer:

B = { x:x is the multiple of 3 less than 14 }

I hope that this will help you...

Answer 2

ANSWER:-

B={x:x=3n,n belongs to N and 1 less or equal to n and n is less than or equal to 4}

HOPE IT HELPS!!..