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For an G.P. a = 16 and fifth term is 81 ...

For an G.P. a = 16 and fifth term is 81 then common ratio ........

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`3/2`
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In a sequence of 21 terms the first 11 terms are in A.P. with common difference 2. and the lastterms are in G.P. with common ratio 2. If the middle tem of the A.P. is equal to themiddle term of the G.P., then the middle term of the entire sequence is

KUMAR PRAKASHAN-OBJECTIVE SECTION AS PER NEW PAPER SCHEME -Sequence and Series (Fill in the blanks )
  1. For arithmetic sequence a = 2 and a5 = 14 then d = ........

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  2. For arithmetic sequence a(8) =23 common difference d = 5 then a = .......

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  3. For arithmetic sequence

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  4. For an A.P a = 20 and l = 97 then S(20)= ..........

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  5. If a, b, and c are in A.P then (a + 2b -c) . ( 2b +c-a) . (c+a-b) = .....

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  6. For arithmetic sequence a(1),a(2),a3 ........ If a(1)+a(5)+a(10)+a(15)...

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  7. If 25, x - 6 and x - 12 are in G.P then x = .......... or ......... .

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  8. Third term of G.P. is 3 then product of its first 5 terms is ............

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  9. Eighth term of G.P is 128 and common ratio is r = 2 then product of fi...

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  10. For an G.P. a = 16 and fifth term is 81 then common ratio ........

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  11. How many terms of G.P. 3, 3^2, 3^3, … are needed to give the sum 120?

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  12. For an geometric seq. (5)/2,(5)/(4),(5)/8.......a(n) = ............. .

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  13. A1 and A2 are arithmetic mean between a and b also G1 and G2 are geome...

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  14. For numbers 6 and 24, A - G = ...... .

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  15. 10 is Geometric mean between 5 and x then x = ......... Where x in R^(...

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  16. 12 is arithmetic mean between x and 22 then x = ............

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  17. 10 arithmetic mean between a and b are A(1),A(2),A(3).........A(10) th...

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  18. If sumn = 55 then sumn^2 . = ...............

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  19. sum(r=1)^n(2r+1)=...... .

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  20. Sum of the series 1-(1)/(2)+1/(2^2)-1/(2^3)+............oo=.........

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