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![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
Ta có:
\(A=\left(2^1+2^2+2^3+....+2^{2016}+2^{2017}\right)-2^{2018}\)
\(\Rightarrow2A-A=\left[\left(2^2+2^3+2^4+...+2^{2017}+2^{2018}-2^{2019}\right)\right]-\left[\left(2+2^2+2^3+...+2^{2016}+2^{2017}\right)-2^{2018}\right]\)
\(A=2+2.2^{2018}+2^{2019}=2+2.2^{2019}=2+2^{2020}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(A=2^{2018}-2^{2017}-2^{2016}-.....-2^1-2^0\)
\(\Rightarrow-A=2^{2018}+2^{2017}+2^{2017}+.....+2^1+2^0\)
\(\Rightarrow-A=2^0+2^1+2^2+......+2^{2017}+2^{2018}\)
\(\Rightarrow2\left(-A\right)=2+2^2+2^3+......+2^{2018}+2^{2019}\)
\(\Rightarrow2\left(-A\right)-\left(-A\right)=-A=2^{2019}-2^0\)
\(\Rightarrow A=-\left(2^{2019}-1\right)=-2^{2019}+1=1-2^{2019}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
Ta có:
\(\Rightarrow A=B.\)
\(\Rightarrow A^{2017}=B^{2017}\)
\(\Rightarrow\left(A^{2017}-B^{2017}\right)^{2018}=\left(B^{2017}-B^{2017}\right)^{2018}=0^{2018}=0.\)
Vậy \(\left(A^{2017}-B^{2017}\right)^{2018}=0.\)
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