Question

URGENTE, POR FAVOR!!
Associando a função com sua representação gráfica, assinale a alternativa correta. (I) f(x) = senx + |senx|; 0 ≤ x ≤ 2π
(II) g(x) = 2|cosx|; 0 ≤ x ≤ 2π
(III) h(x) = 2|sen2x|; 0 ≤ x ≤ 2π

Answer 1

$\boxed{\begin{array}{l}\underline{\sf Observe\,a\,figura\,que\,eu\,anexei}\\\begin{array}{c|c|c|c}\bf x &\bf sen(x)&\bf |sen(x)|&\bf sen(x)+|sen(x)|&\rm\\\rm 0&\rm0&\rm0&\rm0+|0|=0\\\\\rm\dfrac{\pi}{2}&\rm1&\rm1&\rm1+|1|=2\\\\\rm\pi&0&0&0+|0|=0\\\\\rm\dfrac{3\pi}{2}&\rm-1&\rm1&-1+|-1|=0\\\\\rm2\pi&\rm0&\rm0&0+|0|=0\end{array}\end{array}}$