A = 2008 x 2008
A = ( 2007 + 1 ) x 2008
A = 2007 x 2008 + 2008
B = 2007 x 2009
B = 2007 x ( 2008 + 1 )
B = 2007 x 2008 + 2007
Vì 2008 > 2007 nên A > B .
Chúc bạn học giỏi !
A = 2008 x 2008
A = ( 2007 + 1 ) x 2008
A = 2007 x 2008 + 2008
B = 2007 x 2009
B = 2007 x ( 2008 + 1 )
B = 2007 x 2008 + 2007
Vì 2008 > 2007 nên A > B .
Chúc bạn học giỏi !
bang nhau nha ban
chuc ban hok tot
bang nhau nha ban
chuc ban hok tot
B= 2007 X 2009
= 2007 X (2008+ 1)
= 2007 X 2008+ 2007
A= 2008 X 2008
= 2008 X (2007+ 1)
= 2008 X 2007+ 2008
Vì 2007 < 2008 nên 2008 X 2007+ 2007 < 2008 X 2007+ 2008
B= 2007 X 2009
= 2007 X (2008+ 1)
= 2007 X 2008+ 2007
A= 2008 X 2008
= 2008 X (2007+ 1)
= 2008 X 2007+ 2008
Vì 2007 < 2008 nên 2008 X 2007+ 2007 < 2008 X 2007+ 2008
B = 2007 x 2009
B = ( 2008 - 1 ) x ( 2008 + 1 )
B = ( 2008 ) 2 - 12
Ta thấy 2008 x 2008 = 20082
=> A = 2008 x 2008 > B = 2007 x 2009
B = 2007 x 2009
B = ( 2008 - 1 ) x ( 2008 + 1 )
B = ( 2008 ) 2 - 12
Ta thấy 2008 x 2008 = 20082
=> A = 2008 x 2008 > B = 2007 x 2009