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ATQ, Let the first term be 'a' and common difference be 'd' ATQ; a + (a + d) + (a + 2d) = 108 or, 3a + 3d = 108 so, a + d = 36 .......... (I) ATQ; (a + d)2 + a2 = 1872 Or, 362 + a2 = 1872 Or, a2 = 576 So, a = ±24 (Since, the given three numbers are positive, a = 24) So, d = 36 - 24 = 12 Quantity I: 69th term = a + (69 - 1) × d = a + 68d = 24 + 68 × 12 = 840 So, Quantity I = 840 Quantity II: First term = 24 Second term = 24 + 12 = 36 So, required product = 24 × 36 = 864 So, Quantity II = 864 So, Quantity II > Quantity I
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