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If tenth of an A.P. is 19 and sum of fi...

If tenth of an A.P. is 19 and sum of first fifteen
terms is 225 then fifth term of A.P. is

A

5

B

6

C

9

D

7

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3
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AAKASH INSTITUTE-SEQUENCES AND SERIES -Assignment (SECTION - B) One option is correct
  1. If the sum of first n terms of an A.P. is an^(2) + bn and n^(th) ...

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  2. If tenth of an A.P. is 19 and sum of first fifteen terms is 225 th...

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  3. The maximum sum of the series 100 + 98 + 96 + … is

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  4. If theta1,theta2,theta3, ,thetan are in AP, whose common difference i...

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  5. Consider that 10 arithmetic means are inserted between 3 and 7 and ...

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  6. Let tr denote the r^(th) term of an A.P. Also suppose tm=1/n and tn=1...

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  7. The sum of the first 100 terms common to the series 17, 21, 25, 29...

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  8. If the sixth term of a GP be 2, then the product of first eleven te...

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  9. Let an be the nth term of a G.P. of positive numbers. Let sum(n=1)^(10...

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  10. The series . (2x)/(x + 3) + ((2x)/(x + 3))^(2) + ((2x)/(x + 3))^(3) +...

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  11. Four geometric mens are inserted between the number 2^(11) - 1 an...

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  12. Find the values of x in (-pi,pi) which satisfy the equation 8^(1+|cosx...

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  13. If one G.M., G and two A.M.\'s p and q be inserted between two given q...

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  14. the sum of three numbers in G.P. is 56. If we subtract 1,7,21 from the...

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  15. Let a, b be the roots of the equation x^(2) - 4 x k(1) = 0 and c ,...

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  16. If a ,b ,c are three distinct real numbers in G.P. and a+b+c=x b , the...

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  17. Sum of the series 1+2.2+3.2^2 +4.2^3+.....+100.2^99 is

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  18. If 3+1/4(3+p)+1/(4^2)(3+2p)+... + oo=8, then p

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  19. The value of 2^(1/4).4^(1/8).8^(1/16),,,,,,,oo is equal to.

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  20. Let S denotes the infinite sum 2 + 5x + 9x^(2) + 14x^(3) + 2x^(4) ...

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