The function f(x) = { 1/x, x ≠ 0; 0, x = 0 } is:

Practice Questions

Q1
The function f(x) = { 1/x, x ≠ 0; 0, x = 0 } is:
  1. Continuous at x = 0
  2. Not continuous at x = 0
  3. Continuous everywhere
  4. None of the above

Questions & Step-by-Step Solutions

The function f(x) = { 1/x, x ≠ 0; 0, x = 0 } is:
  • Step 1: Understand the function f(x). It is defined as f(x) = 1/x when x is not equal to 0, and f(0) = 0 when x is equal to 0.
  • Step 2: Identify the point we are checking for continuity, which is x = 0.
  • Step 3: Find the limit of f(x) as x approaches 0. This means we look at what happens to f(x) when x gets very close to 0 but is not equal to 0.
  • Step 4: Calculate the limit: As x approaches 0 from the left (negative side) and from the right (positive side), f(x) = 1/x goes to negative infinity and positive infinity respectively.
  • Step 5: Since the limit does not exist (it goes to different values from each side), we conclude that the limit of f(x) as x approaches 0 is not equal to f(0).
  • Step 6: Since the limit does not equal f(0), the function is not continuous at x = 0.
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