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(1/2)-2 + (1/3)-2 + (1/4)-2 = ?(a) (61/144) (b) 29 (c) (144/61) (d) none of these |
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Answer» (b) 29 We know that, = (1/2)-2= (2/1)2 … [∵ (a/b)-n = (b/a) n] = (1/3)-2 = (3/1)2 … [∵ (a/b)-n = (b/a) n] = (1/4)-2 = (4/1)2 … [∵ (a/b)-n = (b/a) n] Now add, = (2)2+ (3)2+ (4)2 = 4 + 9 + 16 = 29 |
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