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In an AP a(n) = (5n-3)/(4), then a(7) = ...

In an AP `a_(n) = (5n-3)/(4)`, then `a_(7)` = ………..

A

8

B

10

C

9

D

7

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The correct Answer is:
A
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VGS PUBLICATION-BRILLIANT-PROGRESSIONS-Part - B Observation bits to solve various bits (Given in the public examination)
  1. Formula for sum of 'n' terms in an AP = …………..

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  2. The common difference of AP 1, -1, -3, ……. Is …………

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  3. In an AP a(n) = (5n-3)/(4), then a(7) = ………..

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  4. Which term of G.P. 3, 3sqrt(3), 9, ……. equals to 243?

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  5. If x, x+2, x+6 are three consecutive terms in G.P. find the value of '...

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  6. If a(n) = (n(n+3))/(n+2), then find a(17).

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  7. The 21^(th) of an A.P., whose first two terms are -3 and 4 is ………..

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  8. The common difference of an A.P. for which a(18)-a(14) = 32 is …….

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  9. In an A.P., if a = 1 , a(n) = 20 and S(n) = 399, then n = ……..

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  10. Which term of the G.P. 1/3, 1/9, 1/27,………. is 1/(2187)?

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  11. Which term of A.P., 18,15,12,……. Equal to '0' ?

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  12. If k, 2k+1, 2k+3 are three consecutive terms in A.P., then find the va...

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  13. If a(n) = (n)/(n+1), then a(2017) = ………..

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  14. n^(th) term of a progression a, ar ar^(2), ………. is …………

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  15. IF 4,a,9 are in G.P., then a=………..

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  16. The next term in A.P., sqrt(3), sqrt(12), sqrt(27) is ……..

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  17. The common difference of A.P. log(2) 2, log(2)4, log(2)8, is …………..

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  18. The sum of first 'n' odd natural numbers is ………

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  19. Determine the AP whose 3^(rd) term is 5 and the 7^(th) term is 9.

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  20. If (i) -1.0 , -1.5, -2.0, -2.5, ……… and (ii) -1, -3, -9, -27, ……. are ...

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