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Solve : 25+22+19+16+...+x=115...

Solve : `25+22+19+16+...+x=115`

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Given that,
`25+22+19+16+...+x=115`
this is an A.P with common difference =(−3) and the first term `a=25`
Let number of terms =`n` ...
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RD SHARMA-ARITHMETIC PROGRESSIONS-Solved Examples And Exercises
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  2. Find the sum of the series : 3+5+7+6+9+12+9+13+17+.... +3n terms.

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  3. Solve : 25+22+19+16+...+x=115

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  4. Solve: 1+4+7+10++x=590.

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  8. The first term of an A.P.is 2 and the last term is 50. the sum of all ...

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  9. The number of terms of an A.P. is even, the sum of odd terms is 24, of...

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  10. If in an A.P, Sn=n^2p and Sm=m^2p, then Sp is equal to

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  11. If 12th term of an A.P. is -13 and the sum of the first four terms i...

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  12. If the 5th and 12th terms of an A.P. are 30 and 65 respectively, wha...

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  13. Find the sum of n terms of an A.P. whose kth terms is 5k+1.

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  14. Sum of all two digit numbers which when divided by 4 yield unity as re...

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  15. If the sum of a certain number of terms of the AP 25,22,19... is 116. ...

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  16. How many terms of the A.P. -6, -(11)/2,\ -5,... are needed to give the...

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  17. In an A.P. the first term is 2 and the sum of the first five terms is ...

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  18. If Sn=n P+(n(n-1))/2Q ,w h e r eSn denotes the sum of the first n term...

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  19. The sum of n terms of two arithmetic progressions are in the ratio 5n+...

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  20. If 2/3, k ,5/8 are in A.P., find the value of kdot

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