If -2/7, x, -7/2 are in G.P, then x =
1
-1
± 1
None of these
How many terms of the G.P 3, 3/2, 3/4......... are needed to give the sum 3069/512?
10
11
9
8
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
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
If G is geometric mean of numbers a and b then G =
√ab
±√ab
ab
a/b
The first 3 terms of the sequence an = (n+1)/(n+2) is
5/4, 4/3, 3/2
2/3, 3/4, 4/5
4/5, 3/4, 2/3
4, 3, 2
If the sum of n terms of an A.P is (Pn + qn2) where p and q are constants. Then the common difference is
2 + q
2q
2/q
2 - q
The 10th term of an A.P is 52 and 16th terms is 82. Then the 32nd term is
162
165
173
The value of 112 + 122 + .....202 is
3845
2485
2470
3255
