If twice the 11th terms of an AP is equal to 7 times its 21st term, then its 25th term is equal to.
24
120
0
None of these
In an arithmetic progression, the 24th term is 100. Then, the sum of the first 47 terms of the arithmetic progression is
2300
2350
2400
4700
Geometric mean of 7,72,73,....7n is
7
7n/2
7n
The product (32) (32)1/6 (32)1/36 ..... is
16
32
64
If 2/3, k, 5/8 are in AP, then value of k is
15
21
12
31/48
is equal to
n
1/n
1/2 (n+n-1)
1/2 (en + e-n)
The coefficient of xn in the expansion of loga (1+x) is
If three numbers a,b,c are in harmonic progression, then which of the following is true?
1/a, b, 1/c are in AP
1/bc, 1/ca, 1/ab are in HP
ab, bc, ca are in HP
a/b, b/c, c/a are in HP
In an AP the sum of any two terms, such that the distance of one of them from the beginning is same as that of the other from the end, is
first term
sum of first and last terms
last term
half of the sum of the series
If x = 1 + 2 + 4/2! + 8/3! + 16/4! + ...., then x-1 is equal to
e-2
e2
e1/2
