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( 2013 x 2014 + 2014 x 2015 + 2015 x 2016) x ( 1 + 1/3 - 4/3)
=( 2013 x 2014 + 2014 x 2015 + 2015 x 2016) x ( 4/3 - 4/3)
=( 2013 x 2014 + 2014 x 2015 + 2015 x 2016) x 0
=0
Ta có: \(\left(2013\cdot2014+2014\cdot2015+2015\cdot2016\right)\left(1+\dfrac{1}{3}-\dfrac{4}{3}\right)\)
\(=\left(2013\cdot2014+2014\cdot2015+2015\cdot2016\right)\left(\dfrac{3}{3}+\dfrac{1}{3}-\dfrac{4}{3}\right)\)
=0
145/2014 x 35/54 + 145/2014x 19/54
= 145/2014 x ( 35/54 + 19/54 )
= 145/2014 x 1
= 145/2014
Chúc Bn hok tốt :3
( 2014 x 2015 - 2016 ) : ( 2012 + 2013 x 2014 )
= ( 4058210 - 2016 ) : ( 2012 + 4054182 )
= 4056194 : 4056194
= 1
2014*99,9+2014/10
=2014*99,9+2014*0,1
= 2014*(99,9+0,1)
= 2014 * 100
=201400
\(2014\times\left[99,9+\frac{1}{10}+\frac{2010}{10}+\frac{3}{10}\right]=2014\times\left(301+\frac{3}{10}\right)=2014\times301,3=606818,2\)
= \(\frac{145}{2014}\times\left(\frac{35}{54}+\frac{9}{54}\right)=\frac{145}{2014}\times\frac{44}{54}=\frac{145}{1007}\times\frac{11}{27}=\frac{1595}{27189}\)
b) 201400