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7.
a) (2/5) la puterea 34 : (2/5) la puterea 14=
b) (3/7) la puterea 40 : (3/7) la puterea 19=
c) (4/3) la puterea 35 : (4/3) la puterea 21=

8.a) [(2/7 la puterea 3] la puterea 11=
b) [(5/3) la puterea 6] la puterea 10=
c) [(3/4) la puterea 11] la puterea 4=​