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Solution: For exercise note that to show there is a unique
Chapter 4, Problem 34E(choose chapter or problem)
QUESTION: For exercises 32–35 note that to show there is a unique object with a certain property, show that (1) there is an object with the property and (2) if objects A and B have the property, then A = B.Prove that there is at most one real number a with the property that a + r = r for all real numbers r . (Such a number is called an additive identity.)
Questions & Answers
QUESTION: For exercises 32–35 note that to show there is a unique object with a certain property, show that (1) there is an object with the property and (2) if objects A and B have the property, then A = B.Prove that there is at most one real number a with the property that a + r = r for all real numbers r . (Such a number is called an additive identity.)
ANSWER:Solution
Step 1 : To Prove that there is at most one real number a with the property that a + r = r for all real numbers r.