Question

1.Tính:

\(M=2^{2010}-\left(2^{2009}+2^{2008}+...+2^{10}+2^0\right)\)

Answer 1

\(M=2^{2010}-2^{2009}-2^{2008}-...-2^1-2^0\)

\(-M=-\left(2^{2010}-2^{2009}-2^{2008}-...-2^1-2^0\right)\)

\(-M=2^{2010}+2^{2009}+2^{2008}+...+2^1+2^0\)

\(-2M=2.\left(2^{2010}+2^{2009}+2^{2008}+...+2^1+2^0\right)\)

\(-2M=2^{2011}+2^{2010}+2^{2009}+...+2^2+2^1\)

\(-M=2^{2011}+2^{2010}+...+2^2+2^1-\left(2^{2010}+2^{2009}+2^{2008}+...+2^1+2^0\right)\)

\(-M=2^{2011}-1=>M=-2^{2011}+1\)

Answer 2

tại sao lại có dấu ''-'' vậy bạn mình không hiểu lắm.