1. a=2^10 ×5^8 = 2^2 × 10^8= 4×10^8
raspuns corect D
2. au acelasi exponent, deci compari bazele 3 si 5
3<5, atunci raspunsul e B
3. 2^12(1+2^3+2^4) = 2^12× (1+8+16)= 2^12×25= (2^6×5)^2= 320^2
raspunsul e B
