Question
If the function $f$ is defined by $f ( x )=\left\{\begin{array}{ll}x+2 ; & x>1 \\ 2 ; & -1 \leq x \leq 1 \\ x-1 ; & -3
✓
Answer
f(x) = x + 2 when x = {2, 3, 4, ……}
f(x) = 2
f(x) = x – 1 when x = {– 2}
f(x) = x + 2
f(2) = 2 + 2 = 4
f(x) = x – 1
f(– 2) = – 2 – 1 = – 3
f(2) + f(– 2) = 4 – 3
= 1
f(x) = 2
f(x) = x – 1 when x = {– 2}
f(x) = x + 2
f(2) = 2 + 2 = 4
f(x) = x – 1
f(– 2) = – 2 – 1 = – 3
f(2) + f(– 2) = 4 – 3
= 1
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