Is (2^1/2 + 7^1/3)^1/2 irrational?

  • Thread starter trap101
  • Start date
  • #1
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Hi,

So I proved that 71/3 is irrational, and I know 21/2 is irrational, but how can I show if (21/2 + 71/3)1/2 is irrational?

Hint of where to start?
 

Answers and Replies

  • #2
342
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Never mind, figured it out.
 
  • #3
103
1
Never mind, figured it out.

Can you give a summary as to how you figured it out?

I was working on it after you posted it.
 

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