Question

Qz(5/10)
[tex] \: \: [/tex]
f(x + 3) = 2x + 4

Maka:

f(2) = ...​

Answer 1

Penjelasan dengan langkah-langkah:

FUNGSI KOMPOSISI

f(x + 3) = 2x + 4

f(2) = ...

x + 3 = 2

x = 2 – 3

x = –1

f(2) = 2(–1) + 4

f(2) = 4 – 2

f(2) = 2

cara kedua :

f(x + 3) = 2x + 4

f(x) = 2(x – 3) + 4

f(x) = 2x – 6 + 4

f(x) = 2x – 2

f(x) = 2(x – 1)

f(2) = 2(2 – 1)

f(2) = 2(1)

f(2) = 2

Answer 2

• Menentukan nilai x :

f ( x ) = x + 3 = 2

f ( x ) = x = 2 - 3

f ( x ) = x = -1

• Menentukan nilai f ( -1 )

f(-1) = 2x + 4

f(-1) = 2(-1) + 4

f(-1) = -2 + 4

f(-1) = 4 - 2

f(-1) = 2