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ARATATI CA √2SUPRA √2-1+2(√2-1)SUPRA √2=4

Răspuns :

√2/(√2-1)+2(√2-1)/√2=
=√2(√2+1)/(√2-1)(√2+1)+2√2(√2-1)/2=
=(2+√2)/(2-1)+√2(√2-1)=
=2+√2+2-√2= 2+2=4