Sunday

January 25, 2015

January 25, 2015

Posted by **Tiffany** on Saturday, June 7, 2014 at 8:04pm.

=(1+n)+(1+n)+(1+n)+...

How many copies of n+1 are in there in the second line?

with n=6 and n=7

- Number Theory -
**Steve**, Saturday, June 7, 2014 at 10:47pmSince the n numbers are divided up in pairs, I'd say n/2 copies.

Hence the formula for the sum: n(n+1)/2

Technically, that's [n+1]/2 where [] is the greatest-integer function.

**Answer this Question**

**Related Questions**

Math - A copy machine makes 60 copies per minute. A second copy machine makes 80...

Statistics - There is a mathematical theory called queuing theory that studies ...

Math - At Kinko's, Sean made 56 copies costing $16. Color copies cost $0.75 each...

math,correction,help - please can someone tell me where i am wrong. Directions: ...

algebra1 - the school bought a new copy machine which makes 20 copies per minute...

algebra1 - the school bought a new copy machine which makes 20 copies per minute...

Math - School is planning to purchase a new copy machine. The principal has ...

math - The president of the country PTA organization makes copies of membership ...

math - The president of the country PTA organization makes copies of membership ...

math - After selling 160 copies of the program to a school play, an usher had ...