Stim ca [tex] \sqrt{a}= a^{ \frac{1}{2} } [/tex].
[tex] \sqrt{2 \sqrt{2 \sqrt{2} } }= \sqrt{2 \sqrt{2* 2^{1/2} } } = \sqrt{2 \sqrt{2 ^{3/2} } } = \sqrt{2*(2 ^{3/2}) ^{1/2} }= [/tex][tex] \sqrt{2* 2^{3/4} }= \sqrt{2 ^{7/4} } = (2^{7/4})^{1/2}= 2^{ \frac{7}{8} } [/tex]
