tính M
M= 2^2010- (2^2009+2^2008 +.......+ 2^1 +2^0 )
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Đặt A = 22009 + 22008 + ... + 21 + 20
2A = 22010 + 22009 + ... + 22 + 21
2A - A = (22010 + 22009 + ... + 22 + 21) - (22009 + 22008 + ... + 21 + 20)
A = 22010 - 20
A = 22010 - 1
=> 22010 - (22009 + 22008 + ... + 21 + 20)
= 22010 - (22010 - 1)
= 22010 - 22010 + 1
= 1
Đặt A = 22009 + 22008 + ... + 21 + 20
2A = 22010 + 22009 + ... + 22 + 21
2A - A = (22010 + 22009 + ... + 22 + 21) - (22009 + 22008 + ... + 21 + 20)
A = 22010 - 20
A = 22010 - 1
=> 22010 - (22009 + 22008 + ... + 21 + 20)
= 22010 - (22010 - 1)
= 22010 - 22010 + 1
= 1
Đặt N = 22009 + 22008 + 22007 +......+ 21 + 20
2N = 22010 + 22009 + 22008 +.....+ 22 + 21
2N - N = 22010 - 20
=> N = 22010 - 1
=> M = 22010 - (22010 - 1)
=> M = 22010 - 22010 + 1
=> M = 1
Đặt N=22009+22008+...+1
=>2N=22010+22009+...+2
=>2N-N=(22010+22009+...+2)-(22009+22008+...+1)
=>N=22010-1
Mà M=22010-N=22010-(22010-1)=1
Đặt \(A=2^{2009}+2^{2008}+...+2^1+2^0\)
Ta có : \(2A=2^{2010}+2^{2009}+...+2^2+2^1\)
\(\Rightarrow2A-A=2^{2010}-2^0\Rightarrow A=2^{2010}-1\)
Do đó : \(M=2^{2010}-A=2^{2010}-\left[2^{2010}-1\right]=1\)
\(M=2^{2010}-\left(2^{2009}+2^{2008}+...+2^1+2^0\right)\)
\(2^{2010}-M=2^{2009}+2^{2008}+...+2+1\)
\(2\left(2^{2010}-M\right)=2\left(2^{2009}+2^{2008}+...+2+1\right)\)
\(2\left(2^{2010}-M\right)=2^{2010}+2^{2009}+...+2^2+2\)
\(2\left(2^{2010}-M\right)-M=\left(2^{2010}+2^{2009}+...+4+2\right)-\left(2^{2009}+2^{2008}+...+2+1\right)\)
\(2^{2010}-M=2^{2010}+2^{2009}+...+4+2-2^{2009}-2^{2008}-...-2-1\)
\(2^{2010}-M=2^{2010}-1\)
=> M = 1
\(M=2^{2010}-\left(2^{2009}+2^{2008}+...+2^1+2^0\right)\)
\(\Rightarrow M=2^{2010}-\left(2^0+2^1+2^2+...+2^{2008}+2^{2009}\right)\)
Đặt \(N=2^0+2^1+2^2+...+2^{2008}+2^{2009}\)
\(\Rightarrow2N=2^1+2^2+2^3+...+2^{2009}+2^{1010}\)
\(\Rightarrow2N-N=2^{2010}-1\)
\(\Leftrightarrow M=2^{2010}-\left(N\right)=2^{2010}-\left(2^{2010}-1\right)=2^{2010}-2^{2010}+1=1\)
Vậy M = 1
M = 22010 - ( 22009 + 22008 + ... + 21 + 20 )
Đặt A = 22009 + 22008 + ... + 21 + 20
=> 2A = 2( 22009 + 22008 + ... + 21 + 20 )
= 22010 + 22009 + ... + 22 + 21
2A - A = A
= ( 22010 + 22009 + ... + 22 + 21 ) - ( 22009 + 22008 + ... + 21 + 20 )
= 22010 + 22009 + ... + 22 + 21 - 22009 - 22008 - ... - 21 - 20
= 22010 - 20
=> M = 22010 - ( 22010 - 20 )
= 22010 - 22010 + 20
= 20 = 1