usuń niewymierność z mianownika1/1-√2
1/1-√2 = 1*(1+√2)/(1-√2)(1+√2)=1+√2/1+√2-√2-2=1+√2/-1
1√2/ 2
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1/1-√2 = 1*(1+√2)/(1-√2)(1+√2)=1+√2/1+√2-√2-2=1+√2/-1
1√2/ 2