Sets problem

Question

Let Z bet the set of all integers and A = {a,b) : a2 + 3b2 = 28, a, b ԑ Z}

B = {(a,b) : a>b, a, b ԑ Z}. Then, the number of elements in Aᴒ B is –

2                                              4                                              6                                              5

Answer 1

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