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If in an A.P., S(2n)=3.S(n) then S(3n) :...

If in an A.P., `S_(2n)=3.S_(n)` then `S_(3n) : S _(n)`= (a)5 (b) 6 (c)7 (d)8

A

5

B

6

C

7

D

8

Text Solution

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The correct Answer is:
B
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MARVEL PUBLICATION-SEQUENCES AND SERIES -MULTIPLE CHOICE QUESTIONS
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  2. If S(n) is the sum of the first n terms of an A.P. then : (a) S(3n)=3(...

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  3. If in an A.P., S(2n)=3.S(n) then S(3n) : S (n)= (a)5 (b) 6 (c)7 (d)8

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  4. If S(n) denotes the sum of first n terms of an A.P., then (S(3n)-S(n...

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  7. let a1,a2,a3,...........,be an AP such that (a1+a2+a3+...........+ap)/...

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  9. If a1,a2,a3, ,an are an A.P. of non-zero terms, prove that 1/(a1+a2...

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  16. If , in a G.P. {a(n)} it is given that a(1)+a(2)+a(3)+a(4)= 30 ...

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  17. If {a(n)} is a G.P. of positive terms then : (sqrt(a(1)a(2))+sqr...

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  18. The sides of a right angled triangle arein A.P., then they are in the...

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  19. If x,y,z are in G.P and a^x=b^y=c^z,then

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