Question

Determine f o g si f(x)=2x+4 y g(x)=3x^2-1 ayuda Porfavor !!!

Answer 1

f(x)= 2x+4
f(x)= 0
f(0)= 2(0)+4 
f(0)= 0+4
f(0)= 4

g(x)= 3x^2-1
g(x) = 0
g(0) = 3(0)^2 -1 
g(0)= 0 -1
g(0) = -1

Answer 2

$f\left(x\right)=2x+4,\:g\left(x\right)=3x^2-1,\:\left(f\:\circ \:\:g\right)\left(x\right)$
$\mathrm{Para}\:f(x)=2x+4\:\mathrm{sustituir}\:x\:\mathrm{con}\:g\left(x\right)=3x^2-1:$
$f(g(x))=2\left(3x^2-1\right)+4$
$f(g(x))=2\cdot \:(3x^2)+2\left\cdot\:(-1\right)+4$
$f(g(x))=6x^2-2+4$
$\left(f\:\circ \:\:g\right)\left(x\right)=6x^2+2$