The sum of three decreasing numbers in A.P. is 27. If are added to them respectively, the resulting series is in G.P. The numbers are ____.
5, 9, 13
15, 9, 3
13, 9, 5
17, 9, 1
If and are in H.P., then are in ____.
A.P.
G.P.
H.P.
None of the above
The sum of terms of ____.
Sum of the squares of first natural numbers exceeds their sum by 330, then ____.
8
10
15
20
Sum of first terms in the following series is given by ____.
All of the above
The term of series will be ____.
Sum of the series to n terms is ____.
The sum to terms of the infinite series is ____.
None of the above
If for n = 1, 2, 3,…… then ____.
If the arithmetic, geometric and harmonic means between two distinct positive real numbers be and respectively, then the relation between them is ____.