F of G function question - Square root inside a square root?

  • Thread starter nukeman
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  • #1
nukeman
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Homework Statement



The image has the question I don't quite understand!

sgri92.jpg



Homework Equations





The Attempt at a Solution



I understand how to get √(√2 - x) but I don't get how they end up with: 4√2 - x

?
 
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Answers and Replies

  • #2
36,709
8,708

Homework Statement



The image has the question I don't quite understand!

sgri92.jpg



Homework Equations





The Attempt at a Solution



I understand how to get √(√2 - x) but I don't get how they end up with: 4√2 - x
Your notation is incorrect. This is what you wrote:
$$ \sqrt{\sqrt{2} - x}$$

What you should have written is
$$ \sqrt{\sqrt{2-x}}$$

Without using LaTeX, as I did, you could have written √(√(2 - x))

Do you see the difference?
 
  • #3
nukeman
655
0
Your notation is incorrect. This is what you wrote:
$$ \sqrt{\sqrt{2} - x}$$

What you should have written is
$$ \sqrt{\sqrt{2-x}}$$

Without using LaTeX, as I did, you could have written √(√(2 - x))

Do you see the difference?

Ah yea, I see the difference. Gotta start writing in latex!

I still don't understand the problem as I pointed out in the picture. ?
 
  • #4
36,709
8,708
Write the expression in exponent form rather than radical form.
 

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