Diketahui dua buah fungsi f(x) = 5x'2 + 1 dan g(x) = 4x – 1 , tentukan : a. f + g b. f – g c. fg

f(x) = 5x^2 +1 dan g(x) = 4x - 1
a) f + g = (5x^2 +1)+(4x-1)
= 5x^2 +1 +4x -1
= 5x^2 +4x
b) f - g = (5x^2 + 1) - (4x -1)
= 5x^2 + 1 -4x +1
= 5x^2 -4x +2
c) f.g = (5x^2+1) ( 4x -1)
= 20x^3 - 5x^2 +4x -1