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calculus

posted by on .

Help - I have three problems that I am stuck on -

1. Lim x approaches infinity
(x-3/x squared + 4)

2. Lim x approaches 3
x cubed - x squared - 7 x +3/
x squared - 9

3. Lim x approaches negative infinity
(x + square root x squared + 2x)

  • calculus (1 of 3) - ,

    1. You need to use more parentheses to clarify the mathematical operation. I will assume you mean
    1. Lim x -> infinity
    (x-3)/(x^2 + 4)

    When x approaches infinity, you can neglect the constant terms, and you get
    Lim x -> infinity
    (x/x^2) = 1/x

    As x-> infinity, that approaches zero.

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