(adsbygoogle = window.adsbygoogle || []).push({}); Please Help!

Let f be the function given by f(x)=2x/sqrt(x^2+x+1)

a)Find the domain for f. Justify your answer.

b)Write an equation for each horizontal asymptote of the graph f.

c)Find the range of f. Use f'(x) to justify your answer.

Note: f'(x)=(x+2)/(x^2 +x+1)^.5

Please help me with this problem. I don't really know how to do much of it.

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Find the domain for f

**Physics Forums | Science Articles, Homework Help, Discussion**