If a, b, c, d, e, f are in AP, then e - c is equal to _____.
2 ( c - a )
2 ( f - d )
2 (d - c )
d - c
If a and b are two dfferent positive real numbers, then which of the following relations is true ?
2 √ab > ( a + b )
2 √ab < ( a + b )
2 √ab = ( a + b )
None of these
The next term of the sequence 1, 5, 14, 30, 55, ____ is.
95
90
85
91
In an A.P of 81 terms, the 41th term is 10.
41 × 81
10 × 81
10 × 41
10 ×41/2
The nth term of the sequence 3, 6, 9, -----is.
3n + 1
3n
3n + 2
If A M between the roots of a quadratic equation is 8 and GM is 5, then the equation is ______.
x2 + 16x + 25 = 0
x2 - 8x + 5 = 0
x2 - 16x + 25 = 0
x2 - 16x - 25 = 0
5th term of a G.P is 2, then the product of first 9 terms is _________.
256
128
512
The nthe term of the sequence 1/2, 1/6, 1/12, - - - - - is
If a, b, c are in A.P, then 3a, 3b, 3c are in.
A.P
G.P
H.P
If nth term of the G.P 5, -5/2, 5/4, -5/8, .... is , then the value of n is.
4
9
10
11
