Question

Suatu fungsi g(x) =4x+7, jika daerah hasilnya {7,11,15,19,23}, tentukan daerah asalnya!

Answer 1

G(x) = 4x+7

4x+7 = 7
x = (7-7)/4
x = 0

4x+7 = 11
x = (11-7)/4
x = 4/4 = 1

4x+7 = 15
x = (15-7)/4
x = 8/4 = 2

4x+7 = 19
x = (19-7)/4
x = 12/4 = 3

4x+7 = 23
x = (23-7)/4
x = 16/4 = 4

jadi.. domain/daerah asal/D(f) dari fungsi g(x) = 4x+7 adalah {0,1,2,3,4}