a) 2^300 = (2^3)^100 = 8^100
    3^200 = (3^2)^100 = 9^100
vÌ 8 < 9
=> 8^100 < 9^100 ​
=> 2^300 < 3^200
b) 99^20 = (99^2)^10 = 9801^10
Vì 9801 < 9999 ​
=> 9801^10 < 9999^10 ​
=> 99^20 < 9999^10
c) 3^500 = (3^5)^100 = 243^100
    7^300 = (7^3)^100 = 343^100
Vì 243 < 343 ​
=> 243^100 < 343^100 ​
=> 3^500 < 7^300
d) 202^303 = (202^3)^101 = 8242408^101
    303^202 = (303^2)^101 = 91809^101
Vì 8242408 > 91809 ​
=> 8242408^101 > 91809^101
=> 202^303 > 303^202
e) 107^50 = (107^2)^25 = 11449^25
    73^75 = (73^3)^25 = 389017^25
Vì 11449 < 389017
=> 11449^25 < 389017^25
=> 107^50 < 73^75