1^2020 - 2020^0 + 2020^1
= 1 - 1 + 2020
= 0 + 2020
= 2020
a) 350 - 10 . (3x - 1) = 120
10 . (3x - 1) = 350 - 120
10 . (3x - 1) = 230
3x - 1 = 230 : 10
3x - 1 = 23
3x = 23 + 1
3x = 24
x = 24 : 3
x = 8
Vậy x = 8.
b) x^4 = 1296
x^4 = 6^4
x = 6
Vậy x = 6.
c) 2^x = 512
2^x = 2^9
x = 9
Vậy x = 9