limitation of square root (x^2+3x+4/x^3+1) as x approaches -1.
i don't know how to get the rationalize of 1/square root of (X^3 +1)
thanks
If you mean $\displaystyle \sqrt{\frac{x^2+3x+4}{x^3+1}$, then the limit is equal to +oo since the denominator --> 0+ and the numerator is positive. Further, if this is what you meant, then it should be written as the limit as x --> -1 from the right.
If you didn't mean that, then I suggest you post in a much less ambiguous format and, perhaps, re-check the question.