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| 1. |
a, b, c are the first three terms of geometric series. If the H.M. of a and b is 12 and that of b and c is 36 then which of the following hold(s) good?A. `n(n+1)`B. `n^(2)`C. `n(4-n)`D. `n(6-n)` |
| Answer» Correct Answer - A | |