If ix s an element of the set {-2, -1, 1, 2} and y is an element of {1, 2, 3, 4}, how many distinct values of x^y are positive?
+150 1.) x positive, then \(x^y\) can be positive with y element of {1, 2, 3, 4}.
number of distinct value : \(2\times4=8\)
2.) x negative, y must be even number.
number of distinct value : \(2\times2=4\)
Total : 8+4 = 12.
