How many different integers represent the sum of two or more members of the set {-4,-3,-2,-1,0,1,2,3,4}?

2 answers

all integer values from -8 to +8
actually, since you allow for 2 or more members, I'd say that all integer values can be formed using members of the set. In fact, using just {-1,0,1} will produce all integer values.
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