Question 1151999: 1.Find the sum of the even integers between -24 and 226, including end numbers.
Answer by MathLover1(20850)   (Show Source):
You can put this solution on YOUR website!
The series which we want to add can be given as :
 , , ,........, ,
Sum of N numbers in AP is given by:
 ........where,  = First element in AP, = Last element in AP
According to the series we have number of total elements  which can be calculated as:
 , where  = number of elements.
in your case  ,  ,
now we can find the sum:
.....substitute ,, and 
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