Question 1195061
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You wrote this:

k(x)= x^3+1/x+1

That means {{{k(x)= x^3+1/x+1}}}

But I'll bet you didn't mean that at all, right?

I'll bet you meant this instead: {{{k(x)= (x^3+1)/(x+1)}}}

At least learn this:

If you are going to type a fraction all on one line, then
you MUST use parentheses around the entire numerator and/or 
the entire denominator if either one contains more than 
just one letter or just one number.

What you should have typed was this:

k(x) = (x^3+1)/(x+1)

Edwin</pre></font></b>