How many different integers represent the sum of two or more members of the set {-4, -3, -2, -1 , 0, 1, 2, 3, 4}?
Find the greatest sum and the smallest sum.
smallest sum: -4 + (-3) = -7
greatest sum: 4 + 3 = 7
We can assume that \(-7\leq{x}\leq7\) would work.
BUT WAIT.
We check if the sums -6 or 6 are possible, but they aren't. We check if the sums -5 or 5 are possible, and they ARE.
We can assume that all ODD numbers between the interval \(-7\leq{x}\leq7\) work.
Now its up to you to find the answer.
EDIT: Sorry Fixed it was kind of confusing.
How many different integers represent the sum of two or more members of the set {-4, -3, -2, -1 , 0, 1, 2, 3, 4}?
What is the biggest sum?
What is the smallest sum?
So there is at the most how many totals?
I'd write all thes out in a row and then cross them off when I find a sum that adds to that number.
Ultimately all the crossed numbers are possible sums. So count them.