alleryIf p is prime and p divides a², then p divides a. This step is used to prove which number irrational in your syllabus?
A√2
B0.5
C22/7
Dπ
Answer & Solution
Correct answer: A. √2
The "p | a² ⇒ p | a" lemma is the linchpin of the contradiction proof that √2 is irrational.
The same template handles √3 and √5.
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