Question

if A= {a,b,c,d} then n (A) is​

Answer 1

Step-by-step explanation:

a+b = c+d squaring on both sides (a+b)^2 = (c+d)^2 a^2 +b^2+2ab = c^2+d^2+2cd take 2ab ..

Answer 2

n(A) = 4

Hopefully it will help you!!