Lengkap beserta cara dan daerah asal fungsi!

jawab
fungsi

1.
f(x) = 3x +2
g(x) = 2x-1 
a. (f+g)(x) =  3x +2 + 2x - 1 = 5x + 1
b.(f-g)(x) = 3x + 2 -2x + 1 = x + 3
c.(f x g)(x) = (3x+2)(2x -1) = 6x² - x - 2
d. (f/g)(x) = (3x+2)/(2x -1)

2.
f(x) = x²  + 3x -2
(f+g)x = x² + 3
a. g(x) = x² + 3x - 2 - x² - 3 = 3x - 5
b. f(3) = 3² +3(3) -2 =  16 dan g(3)= 3²+ 3 = 12 
c. (f+g)(3) = 16 + 12 = 28
d. (f-g)(3) = 16 -12 = 4