Q. 48 Write delta-epsilon proofs for e... [FREE SOLUTION]

Chapter 1: Q. 48 (page 108)

Write delta-epsilon proofs for each of the limit statements $\lim_{x 鈫� c} f (x) = L$ in Exercises $47 - 60$ .
$\lim_{x 鈫� 2} (3 - 4 x) = - 5$ .

Short Answer

Expert verified

Delta-epsilon proof for $\lim_{x 鈫� 2} (3 - 4 x) = - 5$ is, whenever localid="1648006806212" $0 < |x - 2| < 未$ , we also have localid="1648021669064" $|(3 - 4 x) + 5| < 蔚$ .

Step by step solution

Step 1. Given information

$\lim_{x 鈫� 2} (3 - 4 x) = - 5$ .

Step 2. Consider ε>0, choose δ=ε4.

For all $x$ with localid="1648006934128" $0 < |x - 2| < 未$ ,we also have localid="1648021795730" $|(3 - 4 x) + 5| < 蔚$ .

localid="1648021807616" $|(3 - 4 x) + 5| = |3 - 4 x + 5| = |8 - 4 x| = 4 |2 - x| = 4 |x - 2| < 4 未 = 4 (\frac{蔚}{4}) = 蔚$

Therefore, whenever $0 < |x - 2| < 未$ , we also havelocalid="1648021825608" $|(3 - 4 x) + 5| < 蔚$ .

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91影视

Write delta-epsilon proofs for each of the limit statements $\lim_{x 鈫� c} f (x) = L$ in Exercises $47 - 60$ .
$\lim_{x 鈫� 2} (3 - 4 x) = - 5$ .

Short Answer

Step by step solution

Step 1. Given information

Step 2. Consider ε>0, choose δ=ε4.

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91影视

Write delta-epsilon proofs for each of the limit statements limx鈫�cfx=Lin Exercises 47-60.limx鈫�23-4x=-5.

Short Answer

Step by step solution

Step 1. Given information

Step 2. Consider ε>0, choose δ=ε4.

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Theoretical and Mathematical Physics

Probability and Statistics

Calculus

Geometry

Applied Mathematics

Logic and Functions

Study anywhere. Anytime. Across all devices.

Write delta-epsilon proofs for each of the limit statements $\lim_{x 鈫� c} f (x) = L$ in Exercises $47 - 60$ .
$\lim_{x 鈫� 2} (3 - 4 x) = - 5$ .