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If a, b, c are in A.P. then 3^a, 3^b, 3^...

If a, b, c are in A.P. then `3^a, 3^b, 3^c` are in:

A

A.P.

B

G.P.

C

H.P.

D

None of these.

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MODERN PUBLICATION-SEQUENCES AND SERIES-EXERCISE
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  11. The sum of the numbers 1, 4, 9, 16, ... , 100 is :

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

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  14. If a,b,c are in AP and (a+2b-c)(2b+c-a)(c+a-b)=lambdaabc, then lambda...

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  16. Sum of the series 1^(2) + 3^(2) + 5^(2) + … + n^(2) is :

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  17. 11^3+12^3+13^3+....+20^3 is :

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  19. The 6th term of a G.P. is 32 and its 8th term is 128, then the value o...

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  20. 11^3+12^3+13^3+....+20^3 is :

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