Hi, it is simple arithmetic series sum. The values are not 24 and 25, those are 24 and -25 (minus 25). So, the answer is 24.
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 ?
so please help me
Where is the first term and is the common difference.
So the sequence has the form
So to find out how many terms are in the sequence set
The sum of the first terms of an arithmetic sequence is given by
Now just plug everything in.
Also note that
Using the formula for the sum of the first n integers