Answer:
c
Explanation:
f( - 1) with x < 1 , then
f(- 1) = = = 1
f(1) with x ≥ 1 , then
f(1) = x + 1 = 1 + 1 = 2
Thus
f(- 1) + f(1) = 1 + 2 = 3 → c
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