If S be the sum of first (2n+1) terms of...

If S be the sum of first (2n+1) terms of an A.P and the sum of terms in odd positions of these (2n+1) terms be S', then show that (n+1)S = (2n+1)S'.

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CHHAYA PUBLICATION-SEQUENCE AND SERIES-Exercise 9 B (Short Answer Type Questions)

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Find the sum of the series 1^(2) - 2^(2) - 3^(2) - 4^(2) + 5^(2) - 6^(...
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A person pays Rs.975 in monthly instalments, each instalment is less t...
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If 1 paisa is saved today, 2 paise next day, 3 paise succeeding day an...
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The angles of a polygon are in A.P. lying common difference 5^(@). If ...
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