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mursalovasuriya

Ответ:

 (frac{2}{ sqrt{3} - 1 }  +  frac{3}{ sqrt{3} - 2 }  +  frac{15}{3 -  sqrt{3} } ) frac{1}{5 +  sqrt{3} }  =  \  =  (frac{2( sqrt{3 }  + 1)}{2}  +  frac{3( sqrt{3}  + 2) }{ - 1}  +  frac{15(3 +  sqrt{3}) }{6} ) frac{5 -  sqrt{3} }{22}  =  \ =  ( sqrt{3}  + 1 - 3 sqrt{3}  - 6 +  frac{15}{2 }  +  frac{5 sqrt{3} }{2} ) frac{5 -  sqrt{3} }{22}  =  \  = ( frac{5}{2}  +  frac{ sqrt{3} }{2} ) frac{5 -  sqrt{3} }{22}  =  \  =  frac{5 +  sqrt{3} }{2}  times  frac{5 -  sqrt{3} }{22}  =  frac{22}{2 times 22}  =  frac{1}{2}

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miron2077

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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