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Section 2.2: The Limit of a Function

Numerical Limits

  1. Guess the value of the limit: \(\displaystyle{\lim_{x \to 2} (3x - 5)}\) View Solution
  2. Guess the value of the limit: \(\displaystyle{\lim_{x \to -3} \frac{5x+1}{2x-1}}\) View Solution
  3. Guess the value of the limit: \(\displaystyle{\lim_{x \to 0} \frac{\sin x}{x}}\) View Solution

Graphical Limits

  1. For the function \( f \) whose graph is given below, state the value of each, if it exists. View Solution Graph of a piecewise function showing limits at -3, -2, 2, and 4. (a) \(\displaystyle\lim_{x \to -2^+} f(x)\)   (b) \(\displaystyle\lim_{x \to -2^-} f(x)\)   (c) \(\displaystyle\lim_{x \to -2} f(x)\)
    (d) \(\displaystyle\lim_{x \to -3} f(x)\)   (e) \(\displaystyle\lim_{x \to 4^-} f(x)\)   (f) \(\displaystyle\lim_{x \to 4^+} f(x)\)
    (g) \(\displaystyle\lim_{x \to 4} f(x)\)   (h) \(\displaystyle\lim_{x \to 2} f(x)\)   (i) \(f(-3)\)
  2. Sketch the graph of a function \( f \) that satisfies all of the given conditions. I. \(\displaystyle\lim_{x \to 0^-} f(x) = -2,\; \lim_{x \to 0^+} f(x) = 1,\; f(0) = 3\) View Solution II. \(\displaystyle\lim_{x \to 5^+} f(x) = 4,\; \lim_{x \to 5^-} f(x) = 3,\; \lim_{x \to -2} f(x) = 5,\; f(5) = 4,\; f(-2) = -1\) View Solution III. \(\displaystyle\lim_{x \to 0} f(x) = 1,\; f(0) = 2,\; \lim_{x \to 3^+} f(x) = \infty,\; \lim_{x \to 3^-} f(x) = -\infty,\; f(-1) = 0\) View Solution

Infinite Limits

  1. Determine the infinite limit. View Solution (a) \(\displaystyle{ \lim_{x \to 3^+} \frac{x+1}{x-3}}\)   (b) \( \displaystyle{\lim_{x \to 2^-} \frac{1}{x-2}}\)
  2. Determine the infinite limit. View Solution (a) \(\displaystyle{\lim_{x \to 2} \frac{3-x}{(x-2)^2}}\)   (b) \( \displaystyle{\lim_{x \to 2^+} \ln(x^2 - 4)}\)
  3. Evaluate the one-sided limits for \( \displaystyle f(x) = \frac{2}{x^3 - 1} \). View Solution (a) \(\displaystyle{\lim_{x \to 1^-} f(x)}\)   (b) \(\displaystyle \lim_{x \to 1^+} f(x)\)