- #1

scorpa

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Unfortunately, my calculus class has just gotten to my least favorite subject in the world...limits. There are a few questions I am hopelessly stuck on. Any help would be appreciated.

**The limit as x approaches 1 of (square root x -x^2)/(1-square root x)**

I have no idea how to go about this one. I know that usually when you have a square root you rationalize the equation, but when you have one in the denominator and numerator what do you do?

**Use the Intermediate Value Theorem toshow that there is a root of the given equation in the specified interval. Tanx=2x, (0,1.4)**

For this one I changed it into the form f(x)=tanx-2x , then I found that f(0)=0 and f(1.4)=2.99 therefore f(0)

__<__0

__<__f(2). Is this all I have to do, Is this enough to satisfy the question asking if there is a root between (0,1.4)?

My next questions are ones I was able to get answers for but am unsure of whether I did them correctly.

**Find the limit as x->2 of (2x^2+1)/(x^2+6x-4).**

For this one I believe you are able to simply substitute 2 in for x and that will give you an answer of 3/4

**Find the lim as x ->1 of (x^3-1)/(x^2-1)**

For this question I factored out (x-1) and from there I was able to get an answer of (3/2).

My other questions are similar, and if I know I did these right I can be fairly sure the others are correct. Thank you so much for your time and help.