Răspuns:
Explicație pas cu pas:
2^9×2^11=2^(9+11)=2^20
5^3×5^12=5^(3+12)=5^15
7^10:7^11=7^(10-11)=7^(-1)=1/7
3^23:3^12=3^(23-12)=3^11
2 ^ 9× 3 ^ 9 =6^9
7 ^ 12× 4 ^ 12 =(7×4)^12=28^12
12 ^9× 4 ^ 9 =48^9
24^ 11× 8 ^ 11=192^11
(2^9)^11=2^(9×11)=2^99×
(5³)^7=5^(3×7)=5^21