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If the sum of the first ten terms of an ...

If the sum of the first ten terms of an A.P is four times the sum of its five terms, the ratio of the first terms to the common difference is

A

`1: 2`

B

`2: 1`

C

`1: 4`

D

`4:1`

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A
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AAKASH SERIES-SEQUENCE AND SERIES-Practice Exercise
  1. If S(1), S(2), S(3) be the sum of 10, 20, 30 terms respectively of an ...

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  2. The first, second and last terms of an A.P. are a, b, c respectively, ...

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  3. If the sum of the first ten terms of an A.P is four times the sum of i...

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  4. If a,b,c are in A.P then a((1)/(b) + (1)/(c )), b ((1)/(c ) + (1)/(a))...

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  5. If p, q, r are in A.P the p^(2) (q + r), q^(2) (r + p), r^(2) (p+q) ar...

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  6. If the A.M. between p^(th) and q^(th) terms of an A.P be equal to A.M ...

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  7. If n A.M's are inserted between two quantites a and b then their sum i...

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  8. If n A.M.'s are inserted between 4 and 96 then sum of n A.M.'s is

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  9. If n A.M.'s are inserted between 20 and 80 such that the ratio of firs...

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  10. Fifth term of G.P. is 2. The product of its first nine terms is

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  11. If (m+n)^(th) term and (m-n)^(th) terms of a G.P. are p and q respecti...

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  12. Let a(n) be the n^(th) term of G.P. If Sigma(n=1)^(100)a(2n)=alpha and...

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  13. If 4^(th), 7^(th), 10^(th) terms of a G.P. are p, q, r respectively th...

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  14. If l, m, n are the p^(th), q^(th), r^(th) terms of a G.P which are +ve...

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  15. If S=1 + a + a^(2) + ….+ oo (a lt 1) then the value of q=

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  16. If x= Sigma(n=0)^(oo) a^(n), y= Sigma(n=0)^(oo) b^(n), z= Sigma(n=0)^(...

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  17. If 3 and 2 are A.M and G.M of the roots of a quadratic equation then t...

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  18. If a,b,c are in G.P where a,b,c are positive numbers and "log"(5c)/(a)...

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  19. The arithrmetic mean of two positive numbers is 9 and geometric mean i...

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  20. If A and G are A.M and G.M between two positive numbers a and b are co...

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