Relasi Dan FungsiTolong Kaka Di Jawab Besok Soal nya kumpul​

Jawaban:

1.f (x) = 6x + 3

a. f (8)= 6×8 + 3 = 48 + 3 = 51

b. f (-3) = 6×-3+3 = -18 + 3 = -15

c. f (14) = 6 ×14+3 = 84 + 3 = 87

d. f (x) = 6x + 3 = 57

6x = 57 – 3

6x = 54

x = 9

e. f (x) = 6x + 3 = – 57

6x = -57 – 3

6x = -60

x = -10

2.f(x) = -3x + 5

a.f (6) = -3 × 6 + 5 = -18 + 5 = -13

b. f (-7) = -3 × -7 + 5 = 21 + 5 = 26

c. f (20)= -3 × 20 + 5 = -60 + 5 = -55

d. f (x)= -3x + 5 = -70

-3x = -70 – 5

-3x = -75

x = 25

e. f (x) = -3x + 5 = 35

-3x = 35 – 5

-3x = 30

x = – 10

Berapapun angka yang diketahui substitusikan ke soal setelah itu tinggal dipindah ruaskan.