1 Aduceti la o forma mai simpla
a) 5 la puterea 3pe 2ori 125la puterea 1pe 2ori 5la puterea minus4pe3ori25la puterea 1pe 2
b) 81 la puterea2radical din 2 ori 3 radical din 8 impartit la 27la puterea a 5radical18
2 sa se demonstreze ca numarul (1+radical din 2) la puterea a 2 + (1 - radical din 2) la puterea a doua este numar natural.
3 Calculati
a) log in baza 1pe 3 2-login baza 1 pe 2 18 + log in baza 1 pe3 3
b) lg 1 pe 2 + lg2pe3 + ... + lg9pe 10
aceste puncte sunt de clasa a X-A
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