Question
What is the sum of all integers x,such -36 <x<38?
Answers
Steve
pair them up in this way:
-35,35
-34,34
...
The sum of all those pairs is zero. So, which numbers are left over?
Add them up.
-35,35
-34,34
...
The sum of all those pairs is zero. So, which numbers are left over?
Add them up.