Eric Nicholas K's answer to Amy Ang's Junior College 1 H2 Maths Singapore question.
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An idea. I forgot how to write down the range if the output values are only integers (like whether I should put things like y E Z or not inside the range).
Date Posted:
4 years ago
Rf = [-1, 1] , f(x) ∈ Z
Or
f(x) ∈ Z, -1 ≤ f(x) ≤ 1
Or
f(x) ∈ {-1, 0, 1}
Or
f(x) ∈ Z, -1 ≤ f(x) ≤ 1
Or
f(x) ∈ {-1, 0, 1}
This is a piecewise function so the graph should have the open circles
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