Draw a truth table for x XOR 1 = x

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SUMMARY

The discussion centers on verifying the boolean identity x XOR 1 = x using a truth table. The participant initially attempts to prove the identity false through boolean algebra, concluding that x XOR 1 simplifies to x’. The conversation highlights the challenge of constructing a truth table with only one variable, x, and a constant, 1. Ultimately, the participant seeks guidance on how to effectively draw the truth table to validate their findings.

PREREQUISITES
  • Understanding of boolean algebra concepts
  • Familiarity with XOR (exclusive OR) operation
  • Knowledge of truth tables and their construction
  • Basic understanding of binary operations
NEXT STEPS
  • Learn how to construct truth tables for single-variable boolean expressions
  • Study the properties of XOR operations in depth
  • Explore boolean algebra simplification techniques
  • Investigate the implications of constants in boolean expressions
USEFUL FOR

Students studying boolean algebra, educators teaching logic concepts, and anyone interested in understanding binary operations and truth tables.

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Homework Statement


Using boolean algebra, verify if the identity is true. Draw truth table to verify answers.

x XOR 1 = x

The Attempt at a Solution


x \oplus 1 = x

(x’ * 1) + (x * 1’)
(x’ * 1) + (x * 0)
(x’ * 1) + 0
(x’ * 1)
x’

I've proven that the equation is false. How do I draw truth table to prove it? Help appreciated. Thanks.
 
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You are using the truth table to verify the answer - what values can x take?
 
x can be true or false (1 or 0). I still don't know how to proceed...
 
How would you normally go about drawing a truth-table?
 
Normally I look at the equation; usually there are 2 variables and I list all possible combinations for them. but in this case, there's only one variable and a 1. What do I do with the 1?
 
Not all binary operations require two numbers for input.
The NOT operation for eg.

The XOR operation does not require two variables - just two numbers.
 

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