Question

Tolong bantu jawab 3 soal ini yahh:)

Answer 1

31.
gof (x) = g{f(x)}
gof(x)= g(2x+3) = (2x+3)² - 3(2x+3) + 2
gof(x) = 4x² + 12x  +9 - 6x - 9 + 2
gof(x) = 4x² - 6x + 2

32.
fog(2)= f { g(2)}= f (1/2) = 2(1/2)² + 5(1/2)
fog(2) = 2( 1/4) + 5/2 = 1/2 + 5/2 = 6/2
fog(2)= 3

33.
gof(x) = 2x² + 4x +5
g(x) = 2x+3
gof(x) = g {f(x)}= 2x² + 4x + 5
2. f(x) + 3 = 2x² + 4x + 5
2. f(x)= 2x² + 4x + 5 - 3
2. f(x) = 2x² + 4x + 2
f(x) = 1/2 (2x² + 4x + 2)
f(x)= x² + 2x + 1