Join thousands of students who trust us to help them ace their exams!Watch the first video
Multiple Choice
Given the graph of a function , find a number such that if , then .
A
B
C
D
Verified step by step guidance
1
Step 1: Understand the problem. The goal is to find a value of \( \epsilon > 0 \) such that if \( |x - 1| < \epsilon \), then \( |f(x) - 1| < 0.2 \). This is related to the concept of continuity and the definition of limits.
Step 2: Analyze the graph of \( f(x) \). Look at the behavior of \( f(x) \) near \( x = 1 \). Specifically, observe how \( f(x) \) changes as \( x \) approaches 1 and determine the range of \( x \) values that keep \( |f(x) - 1| < 0.2 \).
Step 3: Determine the interval around \( x = 1 \) where \( |f(x) - 1| < 0.2 \). This involves finding the values of \( x \) such that \( f(x) \) stays within 0.2 units of 1. The interval will help you identify the corresponding \( \epsilon \).
Step 4: Relate the interval to \( \epsilon \). The condition \( |x - 1| < \epsilon \) defines the distance from \( x = 1 \). Choose the largest \( \epsilon \) that satisfies \( |f(x) - 1| < 0.2 \) for all \( x \) within the interval.
Step 5: Verify your choice of \( \epsilon \). Ensure that for the chosen \( \epsilon \), the inequality \( |f(x) - 1| < 0.2 \) holds true for all \( x \) satisfying \( |x - 1| < \epsilon \). This confirms the correctness of your solution.