Question

Aratati ca urmatoarele numere sunt patrate perfecte :
a) 4 la puterea 75
b) 625 la puterea 7
c) 9 la puterea 27
e) (5la puterea 6 ) totul la 9

Answer 1

4^75=(2^2)^75=2^(2x75) patrat perfect
625^7=(5^4)^7=5^(2x2x7)=5^(2x14) patrat perfect
9^27=(3^2)27=3^(2x27) patrat perfect
(5^6)^9=5^54=5^(2x27) patrat perfect

^ inseamna putere
x-inseamna inmultit