Question

Fungsi f ditentukan dengan rumus f(x) = 3x - 7. jika f(2) = a dan f(b) = 8, nilai 2a + b adalah ...

Answer 1

F(2) = 3(2) - 7= 6-7= -1 =a
f(b) = 3b -7= 8
3b= 8 +7
3b= 15
b=15/3
b= 5

2a +b= 2(-1) +5
= -2 +5
= 3

Answer 2

F(x) = 3x - 7
f(2) = 3.2 - 7
a = 6 - 7
a = -1
f(b) = 3b - 7
8 = 3b-7
15 = 3b
b = 5
makan 2a + b = 2(-1) + 5 = 3