[數學]幫忙解題吧~

[數學]幫忙解題吧~

訪客 於 星期二 十月 13, 2009 11:06 pm


In an ordered field if a>b show that a²b<ab²+(a³-b³)/3


prove thaat in an ordered field.
if √2 is a positive number whose square is 2,then √2 <3/2



proposition   Let a≤x≤b ∀n and Xn→X Then a≤x≤b

proof (1) claim:x≤b

         (2) claim:x≥a

訪客

 

[大學]0.0

tree465 於 星期二 十一月 17, 2009 8:14 pm


(a3-b3)/3+ab2
=(a-b)3/3+a2b-ab2+ab2
=(a-b)3/3+a2b >a2b

√22=2<2.25=9/4
√2<3/2

tree465
初學者
初學者
 
文章: 8
註冊時間: 2009-07-11






微積分