Question

A={1,2,3,4,6,8,12} and B= { 1,2,3,6,9} find A-B​

Answer 1

Answer:

A-B means all elements of set A which are not present in B

{4,8,12}

Answer 2

Answer:

A = { 1, 2, 3,4, 6, 8,12 }

B = { 1, 2, 3, 6, 9}

In A there are 7 elements

But in B there is only 5 elements.

So we have to consider other elements in B as zero

B = { 1, 2, 3, 6, 9 , 0, 0 }

A - B = { 0, 0, 0, -2, -3, 8, 12 }