a=√2006-√2005,b=√2007-√2006,c=√2008-√2007 怎样比较这3个数的大小
问题描述:
a=√2006-√2005,b=√2007-√2006,c=√2008-√2007 怎样比较这3个数的大小
答
a=√2006-√2005
=1/(√2006+√2005),
b=√2007-√2006
=1/(√2007+√2006),
c=√2008-√2007
=1/(√2008+√2007 )
分母大的反而小
所以
a>b>c