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1,-1, 1, -1,1,-1,…… up to 131 terms, the...

1,-1, 1, -1,1,-1,…… up to 131 terms, then `S_(131)` =

A

1

B

-1

C

131

D

130

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VGS PUBLICATION-BRILLIANT-PROGRESSIONS-EXERCISE
  1. if a = 3 and a(7) = 33, then a(11) is

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  2. -20, -18, -16, ………… which term of this A.P. is a first positive term?

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  3. 1,-1, 1, -1,1,-1,…… up to 131 terms, then S(131) =

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  4. The 10^(th) term of the AP 3,11,19,…. Is ……….

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  5. ………. term of AP 21 , 18, 15, ……. is -81.

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  6. The 8th term from the end of the AP 7,10,13, ….. 184 is ………..

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  7. The nth term of a, a+d, a+2d, ……… is ………….

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  8. In the AP, first term is 4 and common difference is -1 then AP is ………....

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  9. The AP with first term is 8 and common difference 2 1/2 is ……………

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  10. In the AP -9 , -14, -19, -24, ……… a(30) - a(20) = ………….

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  11. The next term of the AP 51, 59 , 67 , 75 is ……………….

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  12. Find the sums given below: (iii) -5+(-8)+(-11)+……+(-230)

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  13. 15th term of the AP x-7, x-2 , x+3, ……… is ………….

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  14. The common ratio of the GP 4, 20, 100, 500, ……. Is ……….

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  15. The 16th term of 4, -4, 4, -4, ………. Is ………………

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  16. AP 1, -1, -3, -5 …………d = …………….

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  17. In the AP -11, -9, -7, ………..d = ………….

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  18. In the AP 100, 103, 106, ……..d = …………..

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  19. A GP with r = -2 is ……………..

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  20. A GP with r = 2 is ……………..

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