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In a geometric progression consisting of...

In a geometric progression consisting of positive terms, each term equals the sum of the next two terms. Then the common ratio of this progression equals `:`

A

`sin 18^(circ)`

B

`2 cos 18^(circ)`

C

`2 cos 18^(circ)`

D

`2 sin 18^(circ)`

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The correct Answer is:
D
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HIMALAYA PUBLICATION-PROGRESSIONS-QUESTION BANK
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  3. In an A.P. the pth term is q and the ( p + q) th term is 0. Then the q...

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  4. The 10th common term between the series : 3+7+11+"……." and 1+ 6 + 1...

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  5. Let S be the sum, P be the product and R be the sum of the reciprocals...

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  6. The minimum value of the expression 3x+ 3^(1-x) , x in R , is :

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  7. In a G.P. of even number of terms, the sum of all terms in 5 times the...

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  8. The length of three unequal edges of a rectangular solid block are in ...

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  9. The minimum value of 4^(x) + 4^(1-x), x in R is :

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  10. Let S(n) denote the sum of the first n terms of an A.P. If S(2n) = 3S(...

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  11. If in an A.P. S(n) = qn^(2) and S(m) = qm^(2), where S(r ) denotes the...

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  12. If x,2y, 3z are in A.P. where the distinct numbers x,y,z are in G.P., ...

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  13. If 9 times the 9th term of an A.P. is equal to 13 times the 13^(th) te...

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  14. The third of G.P. is 4. The product of its first 5 terms is :

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  15. If the sum of n terms of an A.P. is given by : S(n) = 3n+ 2n^(2), th...

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  16. If t(n) denotes the nth term of the series : 2+3+6+11+18+"………." , th...

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  17. The A.M and G.M of two numbers are in the ratio 3: 2, then the ratio o...

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  18. If 12 and 9 are respectively A.M and G.M of two numbers, then the numb...

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  19. If one geometric mean G and two arithmetic means A(1) and A(2) are ins...

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  20. If (1)/(2) is the sum to infinity of a G.P, with common ratio (1)/(3),...

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