Answer:
-24
Step-by-step explanation:
-12, -15, -18, -21,
Notice that we are subtracting 3 each time
-12 -3 =-15
-15 -3 = -18
So -21 -3 = -24
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f(x) = 1
f(-2) = 1
Constan function f(n) = k, n and k elemen real