Question Let a and b be two positive integers such that gcd(a, a? – b?) = 1. Then, ged(a + b, a² – ab + b²) = 1 only. gcd(a + b, ab) = 1 only. O This option O This option gcd(a, a – b) = 1 only. None of the choices

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A: 2. To find, gcd(56, 72) : 72 = 56×1 + 16 56 = 16×3 + 8 16 = 8×2 + 0 So, gcd(56, 72) = 8

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