f (x) = 5x + 25, jika (x|x ∈ bil. prima 17 ≤ x ≤ 31 )

f(x) = 5x + 25 >> (17,19,29,31)
f(17) = 5(17) + 25 = 110
f(19) = 5(19) + 25 = 120
f(29) = 5(29) + 25 = 170
f(31) = 5(31) + 25 = 180



*maap cara lanjutannya aku lupa dilanjut sendiri yak*

diketahui : daerah asal (x|x ∈ bil. prima 17 ≤ x ≤ 31 ). maka daerah asal (17,23,29,31)
rumus fungsi f(x) = 5x +25
ditanya : daerah hasil?
jawab : f(17) = 5 (17) + 25 ⇒ 85 + 25 = 110
            f (23)= 5 (23) + 25 ⇒ 115 + 25 = 140
            f (29) = 5 (29) + 25 ⇒145 + 25 = 170
            f (31) = 5 (31) = 25 ⇒ 155 + 25 = 180

maka daerah hasil (110,140,170,180)