Question

considere a funçoes f(x)= 4x-1 e g(x) = 2x+5 calcule o valor da expressao: f (3)- g (-1) sobre g (1) + 1

Answer 1

$f(x)=4x-1$

$f(3)=4\cdot3-1=12-1=11$

$g(x)=2x+5$

$g(-1)=2\cdot(-1)+5=-2+5=3$

$g(1)=2\cdot1+5=2+5=7$

Logo:

$\dfrac{f(3)-g(-1)}{g(1)+1}=\dfrac{11-3}{7+1}=\dfrac{8}{8}=1$