Question

Diketahui notasi fungsi f : x⇒5-2x
Daerah asal = { x | -2 ≤ x ≤ 3 , x∈ bilangan real }
Tentukan daerah hasil !

Answer 1

Daerah asal = { x | -2 ≤ x ≤ 3 , x∈ bilangan real } = {-2,-1,0,1,2,3}
f(x) = 5-2x
f(-2) = 5-2(-2) = 5+4 = 9
f(-1) = 5-2(-1) = 5+2 = 7
f(0) = 5-2(0) = 5
f(1) = 5-2(1) = 5-2 = 3
f(2) = 5-2(2) = 5-4 = 1
f(3) = 5-2(3) = 5-6 = -1
daerah hasil = {-1,1,3,5,7,9}