tentukan (f•g)(2) dan (g•f)(-1) untuk fungsi f(x) =2x² dan g(x) =x +1

langsung aja y

(fog)(2) = f{g(2)}
= 2g(2)²
= 2(2+1)²
= 2(3)²
= 2(9)
= 18

(gof)(-1) = g{f(-1)}
= f(-1) + 1
= 2(-1)² + 1
= 2 + 1
= 3

semoga berguna +,+

(f ○ g(x)
= 2(x + 1)²
= 2(x² + 2x + 1)
= 2x² + 4x + 2

(f ○ g)(2)
= 2(2)² + 4(2) + 2
= 8 + 8 + 2
= 18

(g ○ f)(x)
= 2x² + 1

(g ○ f)(-1)
= 2(-1)² + 1
= 2 + 1
= 3