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Justify whether it is true to say that the following are the nth terms of an AP.
(i) `2n-3 " " ` (ii) `3n^(2)+5 " " ` (iii) `1+n+n^(2)`

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EDUCART PUBLICATION-ARITHMETIC PROGRESSIONS-SHORT ANSWER (SA - II) TYPE QUESTIONS
  1. Justify whether it is true to say that the following are the nth terms...

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  2. Justify whether it is true to say that the following are the nth terms...

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  3. Justify whether it is true to say that the following are the nth terms...

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  4. Find a, b and c such that the following numbers are in AP, a, 7, b, 23...

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  5. Determine the AP whose fifth term is 19 and the difference of the eigh...

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  6. The sum of the first 30 terms of an A.P. is 1920. if the fourth term i...

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  7. Which term of the sequence 20 ,\ \ 19 1/4,\ \ 18 1/2,\ \ 17 3/4,\ d...

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  8. Find the middle term of the A.P. 7, 13, 19, … 247.

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  9. Split 207 into three parts such that these are in AP and the product o...

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  10. How many numbers lie between 10 and 300, which divided by 4 leave a re...

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  11. Find the sum of two middle terms of the AP -4/3,-1,-2/3,-1/3,...,4(1/3...

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  12. Show that the sum of an A.P. whose first term is a, the second term is...

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  13. The first term of an AP is -5 and the last term is 45. If the sum of t...

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  14. If S(n) denotes the sum of first n terms of an AP, then prove that S(1...

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  15. If sum of first 6 terms of an AP is 36 and that of the first 16 terms ...

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  16. The sum of the first n terms of an AP whose first term is 8 and the co...

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  17. If the m^(th) term of an A.P. is 1/n and the n^(th) term is 1/m, show ...

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  18. find the sum of n terms of the series (4-1/n)+(4-2/n)+(4-3/n)+...........

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  19. For what value of n, the nth terms of the arithmetic progressions 63, ...

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

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