1.

I need answer for this too

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Step-by-step EXPLANATION:

\sqrt{ \frac{ \sqrt{2 - 1} }{ \sqrt{2}  + 1} }  =     \sqrt{ \frac{ \sqrt{0.4} }{ \sqrt{2.4} } }  =   \frac{1}{ \sqrt{6 } }  =  \frac{1}{2.44}  = 0.4

answer \: is \: 0.4



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