(2010*2012+1)分之(2011的平方)

问题描述:

(2010*2012+1)分之(2011的平方)

(2010*2012+1)分之(2011的平方) =【(2011-1)(2011+1)+1】分之(2011的平方)
=(2011的平方-1+1) 分之(2011的平方)
=(2011的平方)分之(2011的平方)
=1

(2010*2012+1)分之(2011的平方)
=((2011-1)*(2011+1)+1)分之(2011的平方)
=(2011的平方)分之(2011的平方)
=1

(2010*2012+1)分之(2011的平方)
=2011^2/[(2011-1)(2011+1)+1]
=2011^2/(2011^2-1+1)
=2011^2/2011^2
=1