• Oct 26th 2012, 05:40 AM
manishamishra
Hello friends ,
I am solving this question:

The sum of how may tersm of the series 6 + 12 + 18 + 24 + ... is 1800 ?

where I came across this equation n^2+n-600=0

got the values n=24 or n=25

but i dident understood how to put these values in the eqn as the answer is
ie sum of the terms = only 24

and the question is
sum of how may tersm of the series 6 + 12 + 18 + 24 + ... is 1800?

so how to calcullare sum of the terms ?

thanks..............
• Oct 26th 2012, 06:56 AM
earboth
Quote:

Originally Posted by manishamishra
Hello friends ,
I am solving this question:

The sum of how may tersm of the series 6 + 12 + 18 + 24 + ... is 1800 ?

where I came across this equation n^2+n-600=0

got the values n=24 or n=25 <-- this is wrong: The 2nd solution is n = -25 and therefore invalid with your problem

but i dident understood how to put these values in the eqn as the answer is
ie sum of the terms = only 24

and the question is
sum of how may tersm of the series 6 + 12 + 18 + 24 + ... is 1800?

so how to calcullare sum of the terms ?