$\sum_{n=1}^{\infty} (\frac{1}{5^n})=$

9th number of the following series is? 1, 4, 8, 13, 19

$S_n = n^3 $ for an A.P then $a_n =?$

$\sum_{k=1}^{5} (k^2 -2)=$

The series $1+1+1+1+...$ is:

What is the nth term of the sequence $1, 3, 5, 7, ...$ ?

What are three A.Ms between $-18$ and 4 ?

$\sum_{n=0}^{\infty} (\frac{1}{2^n})=$

For an A.P. if $t_1$ is 3 and $t_{10}$ is 39 then $S_{10}$ is

$\sum_{n=1}^{5} (\frac{1}{i})^n=$

$\sum_{n=2}^{30} (\frac{-1}{i})^{n}=?$

A.M of $1/4$ and $3/8$ is

If 2 and 32 are in G.P. Find their geometric mean

For an A.P, if $a_{12} = 19$ and $a_{17} =29$, what will be value of common difference?

The H.M between 1/2 and 1/8 is:

Sum of the series $0.2 + 0.02 + 0.002 + ... $ upto infinite terms is:

What is the sum of the first 50 natural numbers?

Two A.Ms between 5 and 11 are:

$\sum_{n=1}^{\infty} (-e)^{-2n}=$

$5, -15, 45, ....$ . What will be the sign of the $84563214 ^{th} $ term?

The 11th term of the series will be: $2, 5/2, 3, ... $

$\sum_{n=1}^{\infty} (\frac{-3}{7})^{2n}=?$

Next number of the series 5, 8, 14, 17, ...

$\sum_{n=0}^{\infty} (\frac{1}{2^{n-1}})=$

Calculate $S_8$ given $t_1 =8$ and $r=-1/2$

Which of the following series has $r=0.5$?

What is the difference between A.M and G.M of 5 and 7 ?

Find the sum of the following series: $1^2 + 3^2 + 5^2 +...+n^2$

If $t_n =(\frac{-1}{3})^n t_{n-1}$ and $t_1 = 1$, the series represented by $t_n$ is:

$1+2+3+4+5+....+100$

$2, 2, 2, 2, 2, 2$ is an arithmetic sequence with a common difference

What is the G.M of 32 and 64

$2+4+6+....+100$

What is the sum of the following series? $8+4+2+...+1/32$

$1, 1/3, 1/5, 1/7,$ is ______ series:

Which of the following series converges?

Sum the series upto n-terms: 1+3+5+...

Find the 10th term of the sequence: $\frac{1}{8} , \frac{1}{3} , \frac{-1}{2} , \frac{-1}{7} ,....$

$2+4+8+16+...+$ till $n/2$ terms=?

Calculate the exact value of repeating decimal $0.4545....$

What is the geometric mean between 9 and 4?