Question

If A = {x I x ∈ N, x is a prime factor of 12} and B = {x I x ∈ N, x is a prime factor of 20} are given sets, then find A ∩ B.

Answer 1

(1,2,3,5) factors of 20=2,2,5,1 and factors of 12=2,2,3,1

Answer 2

Hi ,

i ) A ={ x/x€ N , x is a prime factor of 12 }

A = { 2,3 }

ii ) B = {x/x€N,x is a prime factor of 20 }

B = { 2,5 }

iii ) A intersection B

= { 2, 3 } intersection { 2 , 5 }

= { 2 }

I hope this helps you.

: )