Respostas

2013-05-28T21:55:10-03:00

a) f(x)= 5+(-5)/-5+2 = 5-5/7 = 5-0,714285... = 4,2857....

b) f(x)= 5+1/1+2 = 5+1/3 = 5+0,33333.... = 6,33333... 

c) -x-2=5x+2+x+2 ~>  -x-5x-x=2+2+2 ~>  -7x=6 ~>  x=-6/7

 

eu acho que eh isso!! :))