Question

let A=[b, d, e, g, h] and B=[a, e, c, h] verify that n(A-B) =n(A)-n(B)​

Answer 1

Answer:

A = { b , d , e , g , h }

n(A) = 5

B = ( a . e , c , h }

n(B) = 4

A-B = { b , d , g }

n(A-B) = 3

n(A-B) = n(A) - n(B)

5 = 4 - 3

5 ≠ 1

So my friend, n(A-B) ≠ n(A) - n(B)

The equation cannot be verified as it is not true.