If x is an element of the set{-1,1,2}and y is an element of , {-2,-1,0,1,2}how many distinct values of x^y are positive?
Looking at cases x = -1, x = 1, and x = 2, there are 9 values of x^y that are positive.
listforeach(x, a=(-1, 1, 2), listforeach(y, b=(-2, -1, 0, 1, 2), c=x^y
OUTPUT =(1, -1, 1, -1, 1, 1, 1, 1, 1, 1, 0.25, 0.5, 1, 2, 4) = 13 positive values.
But only 5 are DISTINCT =0.25, 0.5, 1, 2, 4
