Question

So sánh

A=2008x2010

B=2009^2

Answer 1

A<B

nhìn là bít rùi

Answer 2

\(A=2008.2010=2008.\left(2009+1\right)=2008.2009+2008\)

\(B=2009.2009=2009\left(2008+1\right)=2008.2009+2009\)

\(2008< 2009\)

\(\Rightarrow2008.2009+2008< 2008.2009+2009\)

\(\Rightarrow A< B\)

Answer 3

A = 2008 x 2010 = 2008² x 4016

B = 2009² =2009 x 2009 =  ( 2008 + 1 ) x  (2008 + 1 ) = 2008² + 2008 +2008 +1 = 2008² +4017

vì 4017 >4016

Vậy A<B

Answer 4

A=2008.2010=20008(2009+1)=2008.2009+2008

B= 2009.2009=2009(2008+)=2008.2009+2009

Vậy A<B