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Recent questions tagged sequences-and-series

In an AP, the sum of n terms is a function of n, $S_{n}=3n^2+2n.$ Find the rth term.

asked Dec 30, 2013 by yamini.v

1 answer

In a series -9,-6,-3,----, find the number of terms n to get a sum $S_{n}$ = 66.

asked Dec 30, 2013 by yamini.v

1 answer

If the 7th term of an AP is 23 and the 12th term is 38, find the first term 'a' and common difference 'd'.

asked Dec 30, 2013 by yamini.v

1 answer

Find the sum of the series 1, $\frac {7}{5}$, $\frac {13}{25}$, $\frac {19}{25}$,----,$\infty$.

asked Dec 30, 2013 by yamini.v

1 answer

Given that four positive numbers are in HP, which of the following is true.

asked Dec 30, 2013 by yamini.v

1 answer

Among 5 numbers a, b, c, d and e the relationships are: a, b, c are in AP and b, c, d are in GP and c, d, e are in HP. Find b, c, d if a = 2 and e = 18.

asked Dec 30, 2013 by yamini.v

2 answers

In a GP, the first term is $312\large\frac{1}{2}$, the common ratio is $\large\frac{1}{2}$. Find the sum of the series to $\infty$ terms.

asked Dec 30, 2013 by yamini.v

1 answer

In a GP, given that the first term is $ 312 ½ $ and the common ratio is $ 1/2 $ find the sum of the terms of the series to infinity.

asked Nov 28, 2013 by harini.tutor

1 answer

Find the least number of terms for the series 16, 24, 36,.... such that the sum of all terms of the series exceeds 2000

asked Nov 19, 2013 by harini.tutor

1 answer

Find the sum of the following series $1 + \frac{1}{2} + \frac{1}{4} + \frac{1}{8} + \frac{1}{16} + \cdots + \infty $

asked Nov 19, 2013 by harini.tutor

1 answer

Given that the fourth and eighth term of a GP are 5 and 80, find the 12th term.

asked Nov 19, 2013 by harini.tutor

1 answer

The sum of an AP is 1815. If the first and last terms are -12 and 133 respectively, find the number of terms in the AP

asked Nov 19, 2013 by harini.tutor

1 answer

Find the sum of the GP $ 1, 2, 4, 8, 16, 64 .... $ upto n terms

asked Nov 19, 2013 by harini.tutor

1 answer

Find the sum of even numbers between 50 and 100

asked Nov 19, 2013 by harini.tutor

1 answer

What is the sum of all odd natural numbers till 200 ?

asked Nov 19, 2013 by harini.tutor

1 answer

Find the 10th term of the AP -3, -1, 1, 3, ....

asked Nov 19, 2013 by harini.tutor

1 answer

Find the sum of the following series : $ 1^{2} + 2^{2} + 3^{2} + 4^{2} + .... + 20^{2}$

asked Nov 19, 2013 by harini.tutor

1 answer

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