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≧ means greater than or equal to. (p – 1)(q - 2)2(r – 3)3(s – 4)4 ≧ 0 For the above expression to be true, we must know the if (p-1), (r-3) are greater than or equal to zero as (q-2)^2, (s-4)^4 will always be ≧ 0 from option 2, p>1, r>3 so (p-1)(r-3)^3 ≧0 So option 2 alone is sufficient and answer is B

If p,q,r, and s are nonzero numbers, is (p – 1)(q - 2)2(r – 3)3(s – 4)4 ≧ 0? (1) q > 2 and s > 4 (2) p > 1 and r > 3

With the question worded like above the correct OA would be C. However as Aleehsgonji correctly deduced the numbers outside the brackets are exponents. Since a number with an even exponent will always be positive we only care about p and r