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If the sum of the first n terms of an Ar...

If the sum of the first n terms of an Arithmetic progression is `S_n=nX+1/2n(n-1)Y` where X and Y are constants, find
`S_1` and `S_2`.

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MAXIMUM PUBLICATION-SEQUENCE AND SERIES-EXAMPLE
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  2. Find the sum to 'n' terms of the series 3xx8+6xx11+9xx14+…....

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  3. If the sum of the first n terms of an Arithmetic progression is Sn=nX+...

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  4. If the sum of the first n terms of an Arithmetic progression is Sn=nX+...

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  5. If the sum of the first n terms of an Arithmetic progression is Sn=nX+...

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  8. The sum of first three terms of a Geometric Progression is 13/12 and t...

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  12. Write the sum of first n natural numbers.

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  19. Find the sum to infinity of the sequence 1,1/3,1/9,………

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