Respostas

2014-03-26T15:49:08-03:00
F(x)= x^{2}.5x+ \frac{4}{ x^{2} }+3x-4
x=4
f(4)= 4^{2}+5.4+ \frac{4}{ 4^{2} } +3.4-4
f(4)=16+20+ \frac{4}{16} +12-4
f(4)=  \frac{36}{1}+ \frac{4}{6}+ \frac{8}{1}
f(4)=mmc
f(4)= \frac{216+4+48}{6} = \frac{268}{6}