Prove by contradiction that 2√√5 is irrational. (Do not assume that √5 is irrational, you should prove it.)

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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**2. Prove by contradiction that \(2\sqrt{5}\) is irrational. (Do not assume that \(\sqrt{5}\) is irrational, you should prove it.)**

**3. Write the following statements in symbolic language and prove each of them:**
Transcribed Image Text:**2. Prove by contradiction that \(2\sqrt{5}\) is irrational. (Do not assume that \(\sqrt{5}\) is irrational, you should prove it.)** **3. Write the following statements in symbolic language and prove each of them:**
Expert Solution
Step 1

The objective is to prove that 25 is irrational.

 

 

 

Euclid's Lemma:

If a prime p divides the product ab of two integers a and b, then p must divide atleast one of those integers a or b.

A rational number is of the form pq,q0

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