Question

Preciso de ajuda !!!!!!!!!!!!​

Answer 1

$\mathrm{Seja\ a\ fun\c{c}\tilde{a}o}\ f:\mathbb{R}\to\mathbb{R}\ \mathrm{tal\ que}\ f(x)=2x+1.$

$\mathrm{O\ chamado\ zero\ da\ fun\c{c}\tilde{a}o\ \acute{e}\ obtido\ ao}\ \text{igualar-se}\ f(x)\ \mathrm{a\ zero.}$

$f(x)=0\Longrightarrow 2x+1=0\Longrightarrow\ 2x=-1\ \therefore\ \boxed{x=-\dfrac{1}{2}}$