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In an A.P.,the sum of first n terms is ...

In an A.P.,the sum of first n terms is `5n^2/2+3n/2`.Find its 20th term.

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KALYANI PUBLICATION-ARITHMATIC PROGRESSION-EXERCISE
  1. Find the sum of all three digit natural number which is divisible by 1...

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  2. In an A.P.,the sum of first n terms is 3n^2/2+5n/2.Find its 25th term...

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  3. In an A.P.,the sum of first n terms is 5n^2/2+3n/2.Find its 20th term...

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  4. Find the sum of all three digit numbers which leave the remainder 3 wh...

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  5. Find the sum of all two digit natural numbers which when divided by 3 ...

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  6. Find the sum of all two digit numbers greater than 50 which when divid...

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  7. If the sum of first n,2n,3n terms of an A.P. be S1,S2 and S3 respectiv...

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  8. If the sum of first n,2n,3n terms of an A.P. be S1,S2 and S3 respectiv...

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  9. A sum of ₹700 is to be used to given seven cash prizes to students of ...

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  10. A contract on construction job specifies a penalty for delay of comple...

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  11. 40 coins are placed in a straight line on a ground.The distance betwee...

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  12. For the A.P.3/2, 1/2, -1/2,-3/2write the first term and common differe...

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  13. Find K if 10,K,-2 are in A.P.

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  14. Are 4,4,4…in A.P.

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  15. If a be the first term and d be the common difference write the three ...

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  16. If a be the first term and d be the common difference write the four c...

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  17. Fill up the gap 2,5,8,….,14,17,….are in A.P.

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  18. Fill the gap The nth term of an A.P.whose first term is a and common ...

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  19. Fill the gap The sum of n terms of an A.P. whose first term is a and ...

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  20. Fill the gap Tn=Sn-….

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