Question

Please jawab !!!
dengan cara :)
1.F(x) = 3x-5
a. F(2) =
b. F(-5)=
c. f(a)=7→a=?

2. F(x)=6-2x
a. F(-4)
b. F(3)
c. f(b)=10→b=?

Answer 1

F(x) = 3x - 5 F(2) = 3(2) - 5 = 6 - 5 = 1 F(-5) = 3(-5) - 5 = -15 - 5 = -20 F(a) = 3(a) - 5 = 7 3a - 5 = 7 3a = 7 + 5 3a = 12 a = 4 F(x) = 6 - 2x F(-4) = 6 - 2(-4) = 6 - (-8) = 6 + 8 = 14 F(3) = 6 - 2(3) = 6 - 6 = 0 F(b) = 6 - 2(b) = 10 6 - 2b = 10 -2b = 10 - 6 -2b = 4 b = -2