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Let Sn denote the sum of n terms of an A...

Let `S_n` denote the sum of n terms of an AP whose first term is a. If common difference d is given by `d=Sn-kS_(n-1)+S_(n-2)` , then k is :

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RD SHARMA ENGLISH-ARITHMETIC PROGRESSIONS-All Questions
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  13. If the sum of first n even natural numbers is equal to k times the sum...

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