Question

dados f(x)=3x+1 g(x)=x-3 determine: a)f(g(5))

Answer 1

 

 f(x)=3x+1

 

g(x)=x-3 => g(5)= 5 - 3 = 2

 

f(g(5)) = f(2) = 3(2) + 1 = 6 + 1 = 7

 

f(g(5)) = 7

fui

Answer 2

Segundo o enunciado:

 

$\text{f}(\text{x})=3\text{x}+1$

 

$\text{g}(\text{x})=\text{x}-3$

 

Logo:

 

$\text{g}(5)=5-3=2$

 

E, portanto:

 

$\text{f}(\text{g}(5))=\text{f}(2)=3\cdot2+1=7$