ok I read the attached...but i could not understand what you want to know...
what do you need help with???
or did you just want someone to check your work??
dan
Dan,
This is an online class I am taking; (which I would not recommend to anyone, take the class in a traditional setting) check my work, give me the anwers, it doesn't really matter. These are the only nine questions I can't answer. I just want to get them done. Call me lazy, whatever...some things just weren't meant for people to understand and I think algebra is it for me.
Thanks,
Luis
Second question (shown in attachment).
If you multiply out the factors the leading lerm is x^3. This dominates
when |x| is large. So as x-> -inf f(x) ->-inf, and as x->inf f(x)->inf.
Also f(x)=0 has three roots: 4, 0, -1. So
f(x)<0, when x<-1,
f(x)>0, when -1<x<0,
f(x)<0, when 0<x<4,
f(x)>0, when x>4
So f(x)>0 on (-1,0)U(4,inf)
RonL