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If a, b, c, d are in H.P., then ab + bc + cd is equal to(1) 3ad(2) (a + b)(c + d)(3) 3ac(4) 0 |
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Answer» If a, b, c, d are in H.P., then ab + bc + cd is equal to (1) 3ad (2) (a + b)(c + d) (3) 3ac (4) 0 |
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