If G is geometric mean of numbers a and b then G =
√ab
±√ab
ab
a/b
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
1 + 2 + 3 +........30 =
465
930
900
500
How many terms of the G.P 3, 32, 33,...... are needed to give the sum 120?
4
5
6
18
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
Which term of the G.P, 2, 8, 32.......... up to n term is 131072?
8th term
9th term
7th term
6thterm
The number of terms of the A.P 3, 7, 11, 15--- to be take so that the sum is 406
10
12
14
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
The 10th term of an A.P is 52 and 16th terms is 82. Then the 32nd term is
162
165
173
None of these
The income of a person is 3,00,000 in the first year and he receives an increase of Rs. 10,000 to his income per year for the next 19 years. Then the total amount, he received in 20 years is
80,00,000
79,00,000
78,00,000
69,00,000
