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

If the sum of the first n terms of an AP is `4n-n^2`,what is the first term(that is `S_1`)?What is the sum of first two terms?What is the second term?Similarly,find the 3rd,the 10th and nth terms.

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R G PUBLICATION-ARITHMETIC PROGRESSION-EXERCISE
  1. Show that a1,a2,…..an,..form an AP where an is defined as below:(i) an...

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  2. Show that a1,a2,…..an,..form an AP where an is defined as below:(i) an...

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  3. If the sum of the first n terms of an AP is 4n-n^2,what is the first t...

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  4. Find the sum of the first 40 positive integers divisible by 6.

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  5. Find the sum of the first 15 muliples of 8.

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  6. Find the sum of all the odd numbers between 0 and 50.

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

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

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  9. In a school,students thought of planting tress in and around the schoo...

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  10. A spiral is made up of successive semicircles,with centers alternately...

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  11. 200 logs are stacked in the following maner:20 logs in the bottom row,...

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  12. In a potato race a bucket is placed at the starting point which is 5 m...

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  13. Which term of the AP:121,117,113,….,is its first negative term?

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  14. The sum of the third and the seventh terms of an AP is 6 and their pro...

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  15. A ladder has rungs 25 cm apart.(see Fig.)The rungs decrease uniformly ...

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  16. The houses of a row are numbered consecuitively from 1 to 49.Show that...

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  17. Define arithmetic Progression.

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  18. Find the nth term of 6,8,10,….

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  19. Write the common difference of an A.P.Whose nth term is an=3n+7

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  20. The first term of an AP.is 6 and the common difference is 2,then deter...

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