Recent content by credico

  1. C

    What Is the Correct Approach to Evaluate Limits at Infinity with Square Roots?

    Haven't learned L'Hopital's rule yet (I know what it is but at this point I think they want us to do it a certain way first). In regards to what you posted in your edit: You used the Limit Laws to separate the two, but how did you calculate the radical limit? Just by plugging in infinity (or...
  2. C

    What Is the Correct Approach to Evaluate Limits at Infinity with Square Roots?

    Homework Statement Evaluate the following limits: lim sqrt(x^2-3x+1)-x x->\infty lim sqrt(x^2-3x+1)-x x->-\infty 2. The attempt at a solution http://img816.imageshack.us/img816/9995/limitproblem11.jpg We have to enter in the answers online into a program that tells us if...
  3. C

    Finding the Range of the Function f(x)=x²+4: Interval Notation Explanation

    Great, that helps a lot. Thanks.
  4. C

    Finding the Range of the Function f(x)=x²+4: Interval Notation Explanation

    You're right, that's what I meant. Good call. But what about interval notation?
  5. C

    Finding the Range of the Function f(x)=x²+4: Interval Notation Explanation

    Find the range of the equation. f(x)=x²+4Things I know for sure: x²>=0 We are brushing up on functions and interval notation in my calc class, and I can't remember how to do this in interval notation. If x is a number being squared it has to be positive or zero. So at the minimum the answer is...