Question

seja f=R→R a função definida por f(x)=5x+2.determine F(4) F(5) F(3) F(-2) F(-4) F(-5)​

Answer 1

$\large\boxed{\begin{array}{l}\sf f(x)=5x+2\\\sf f(4)=5\cdot4+2=22\\\sf f(5)=5\cdot5+2=27\\\sf f(3)=5\cdot3+2=17\\\sf f(-2)=5\cdot(-2)+2=-8\\\sf f(-4)=5\cdot(-4)+2=-18\\\sf f(-5)=5\cdot(-5)+2=-23\end{array}}$