Finding Limits Graphically


Which of the following statements about the function y = f(x) graphed here are true, and which are false?


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k. limx→3+ f(x) does not exist.

Using limθ→0 sin θ / θ = 1

Find the limits in Exercises 23–46.

limθ→0 θcos θ

Using limθ→0 sin θ / θ = 1

Find the limits in Exercises 23–46.

limx→0 (1 − cos 3x) / 2x

Using limθ→0 sin θ / θ = 1

Find the limits in Exercises 23–46.

limh→0− h / sin 3h

Finding Limits Graphically

Which of the following statements about the function y = f(x) graphed here are true, and which are false?

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g. limx→0+ f(x) = limx→0− f(x)

Finding Limits Graphically

Let f(x) = {3 - x , x < 2

2, x = 2

x/2, x > 2

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a. Find limx→2+ f(x), limx→2− f(x), and f(2).

Finding Limits Graphically

Let f(x) = {3 - x , x < 2

2, x = 2

x/2, x > 2

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c. Find limx→−1− f(x) and limx→−1+ f(x).

Finding Limits Graphically

Graph the functions in Exercises 9 and 10. Then answer these questions.

f(x) = {x,−1 ≤ x < 0, or 0 < x ≤ 1

1, x = 0

0, x < −1 or x > 1

d. At what points does the right-hand limit exist but not the left-hand limit?

Infinite Limits

Find the limits in Exercises 37–48. Write ∞ or −∞ where appropriate.

lim x→0⁺ 1 / 3x