Wednesday
December 11, 2013

# Posts by marcus

Total # Posts: 208

Limits-Rationalizing
lim x->1 (1-(1/x^3))/ (1-(1/x^2)) I keep seeming to get a denominator of zero when I rationalized the denominator.

Limits-Factored?
Thank you. I understand that it's because of the (3-x) on bottom that makes it negative?

Limits-Factored?
lim as x approaches 3+ x^2+x-6/18-3x-x^2 I factored it into (x+3)(x-2)/(6+x)(3-x)

Inequalities
Two is greater than five? That's what I do not understand.. Thank you

Inequalities
solve (x-3)/(x+1) > 5 I get x < -2 every time, but it doesnt work when I plug it back in. (I plugged in -5)

Rational vs. Irrational
Okay thank you.

Rational vs. Irrational
Is 3.05313131313131313131313131... irrational or rational? Thanks.

Domain- Interval Notation
Thank you!

Domain- Interval Notation
Domain of g(x) g(x)= sqrt(3-(sqrt(25-x^2)) I got -5, -4, 4, and 5. I wrote it like [-5, -4] U [4, 5] I don't think that's right?

Chemistry
I'm working on a problem dealing with calculating the heat of vaporization for vapor pressures problem. By substituting the problems values into the Clausuis-Clapeyron equation I get: .642= (2.28x10-5) x Delta H vap (J/mol) However, from this point I don't know how to ...

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