Question

if there are 512 relation from a set A= {1,2,3}to a set B , then find number of element in B​

Answer 1

Answer:

number of elements in B is 8

because no.of relations from A to B is n(B)^n(A).

so, n(B)^n(A)=512

n(B)³=512

n(B)=8.