Fungsi f didefinisikan dengan rumus f(x) = 5x – 3 dengan daerah asal {-2, -1, 0, 1, 2, 3}. Tentukan daerah hasilnya?

diketahui :

fungsi = f(x) = 5x – 3

daerah asal = {-2,-1,0,1,2,3}

ditanya :

daerah hasilnya … ?

jawab :

daerah asal -2

f(x) = 5x – 3

= f(x) = 5(-2) – 3

= f(x) = -10 – 3

= f(x) = -13

daerah asal -1

f(x) = 5x – 3

= f(x) = 5(-1) – 3

= f(x) = -5 – 3

= f(x) = -8

daerah asal 0

f(x) = 5x – 3

= f(x) = 5(0) – 3

= f(x) = 0 – 3

= f(x) = -3

daerah asal 1

f(x) = 5x – 3

= f(x) = 5(1) – 3

= f(x) = 5 – 3

= f(x) = 2

daerah asal 2

f(x) = 5x – 3

= f(x) = 5(2) – 3

= f(x) = 10 – 3

= f(x) = 7

daerah asal 3

f(x) = 5x – 3

= f(x) = 5(3) – 3

= f(x) = 15 – 3

= f(x) = 12

jadi, daerah hasilnya adalah {-13, -8, -3, 2, 7, 12}