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2. a) (√5)la puterea 13 ori (√5) la puterea -1= b) (1  supra √2) la a 8  imprtit(1 supra√2)la a 6 a=
c)(√2)la a 23a ori (√2)la  7a imparit(√2)la 26; d)√3ori(√3)²ori(√√3)³ori(√3)la a6a