Question

2. Suatufungsi f(x) = 4x -1. F(a) = -9, dan f(2)= b. Nilai a - b adalah ...​

Answer 1

Jawaban:

- 10

Penjelasan dengan langkah-langkah:

Fungsi

f(x) = 4x - 1

f(a) = - 9

f(x) → f(a)

-9 = 4a - 1

1 - 9 = 4a

- 8 = 4a

a = -8/4

a = - 2

f(2) = b

f(2) = 4(2) - 1

f(2) = 9 - 1

f(2) = 8

b = 8

a - b

= - 2 - 8

= - 10

semoga bermanfaat

Answer 2

Jawaban:

-9

Penjelasan dengan langkah-langkah:

Pertama Kita cari nilai A

[tex]f(x) = 4x - 1 \\ f(a) = 4a - 1 \\ f(a) = - 9 \\ 4a - 1 = - 9 \\ 4a = - 9 + 1 \\ 4a = - 8 \\ a = \frac{ - 8}{4} \\ a = - 2 \\ [/tex]

Kemudian cari nilai B

[tex]f(2) = b \\ f(2) = 4(2) - 1 \\ b = 8 - 1 \\ b = 7[/tex]

maka nilai a-b = -2 - 7 = -9

semoga membantu