Toán Lớp 6: (x trừ 2021) mũ 2021 bằng (x trừ 2021) mũ 2022
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Toán Lớp 6: (x trừ 2021) mũ 2021 bằng (x trừ 2021) mũ 2022
Comments ( 2 )
(x-2021)^2022-(x-2021)^2021=0
(x-2021)^[2021+1]-(x-2021)^2021=0
(x-2021)^2021.(x-2021)-(x-2021)^2021.1=0
(x-2021)^2021.(x-2021-1)=0
(x-2021)^2021.(x-2022)=0
=>\(\left[ \begin{array}{l}(x-2021)^{2021}=0\\x-2022=0\end{array} \right.\)
Th1:(x-2021)^{2021}=0
Vì luỹ thừa luôn có cơ số lớn hơn 0
=>(x-2021)^{2021}=0(vô lý)
=>x in cancel{o}
Th2:
x-2022=0
x=0+2022
x=2022
Vậy x-2022=0 thì x=2022