If G is geometric mean of numbers a and b then G =
√ab
±√ab
ab
a/b
How many terms of the G.P 3, 32, 33,...... are needed to give the sum 120?
4
5
6
18
Given an = (n+1)2/n then a7 is
64
67
49/8
64/7
1 + 2 + 3 +........30 =
465
930
900
500
If the sum of 3 numbers in A.P is 24 and their product is 440, then the numbers are
5, 8, 11
6, 9, 12
7, 10, 13
4, 8, 12
If the nth term of an AP is 6n - 1. Then its (n + 1)th term is
6n + 4
6n + 5
6n - 4
6n - 5
How many terms of the G.P 3, 3/2, 3/4......... are needed to give the sum 3069/512?
10
11
9
8
Which terms of the G.P 2, 2√2, 4,........ is 128?
12
14
13
15
Sum of the sequence 9, 99, 999, 9999 up to n terms is
(10n -1) - n
9/10 (10n - 1) - n
10/9 (10n - 1) - n
None of these
Which term of the G.P, 2, 8, 32.......... up to n term is 131072?
8th term
9th term
7th term
6thterm
