Question

If A = { 1,2,4,7} and B = { 2,3,4}. Find A-B and why​

Answer 1

Step-by-step explanation:

A-B stand for the elements of A not belonging to B

so

A-B is { 1 , 7 }

Answer 2

Answer:

hope i will help

Step-by-step explanation:

A-B

{ 1,2,4,7} - { 2,3,4}

{1,7}

because,

those number which doesn't contain in  second should be written