Posted by **Remy** on Sunday, September 20, 2009 at 11:17am.

When the first n positive integers are added together, their sum is given by

1/2n(n+1)

Find the value of n for which the sum is 105..

Can you show me a step by step please?

## Answer this Question

## Related Questions

- college math - I do not understand a problem from a text book or how to solve ...
- math,help - Can someone show me how step by step how to solve this problem... ...
- Discrete Math - Theorem: For every integer n, if x and y are positive integers ...
- arithmetic - 1. The first and last term of an A.P are, a and l respectively, ...
- arithmetic - 1. The first and last term of an A.P are, a and l respectively, ...
- Math - can anybody show me step by step? Find the sum. (a) 1/3+ 2/3^2+ 2^2/3^3...
- Algebra - Find two consecutive positive integers such that the sum of the square...
- math - how do i solve the sum of the first n even positive integers is h. the ...
- Math Homework - I'm really confused on how to do this. Can someone show me step ...
- Maths! - Find the sum of all multiples of 5 between 100 and 300 inclusive. Ans: ...

More Related Questions