Question

URGENTE, AGRADEÇO DESDE JÁ Sendo f(x) = x2 + 4 e g(x) = x + 1, o valor de f(g(2)) é: * a) 8 b) 9 c) 11 d) 13

Answer 1

f(x) = x² + 4

f( ) = ( )² + 4

f(g(x)) = (x+1)² + 4

f(g(x)) = x²+2x+1 + 4

f(g(x)) = x²+2x+5

f(g( )) = ( )² + 2 ( ) + 5

f(g(2)) = (2)² + 2 ( 2 ) + 5

f(g(2)) = 4 + 4 + 5

f(g(2)) = 13 <= resposta.