实数的混合运算
问题描述:
实数的混合运算
(1)比较√2009-√2008与√2008-√2007的大小 (2)3√1/2-√147-(9*1/√27-4√1/8)
答
(1)√2009-√2008=(√2009-√2008)(√2009+√2008)/(√2009+√2008)=1/(√2009+√2008),√2008-√2007=(√2008-√2007)(√2008+√2007)/(√2008+√2007)=1/(√2008+√2007),所以)2009-√2008<...