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Sum to n terms of 1.2 + 2.3 + 3.4 + …………….. isA) \(\cfrac{n(n-1)(n+2)}3\)B) \(\cfrac{n(n+1)(n+2)}3\)C) \(\cfrac{n(n+1)(n+2)}2\)D) \(\cfrac{n(n-1)(n+2)}6\) |
Answer» Correct option is B) \(\cfrac{n(n+1)(n+2)}3\) |
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