作者ericphoebe (筑梦---踏实---)
看板trans_math
标题[考古] 88成大
时间Tue Jul 5 00:32:56 2005
2
Assume that f:[0,2] => R is a continuous function and ∫ f(x)dx=2 .
0
Prove that there is a c 0≦c≦2 such that f(c)=c
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◆ From: 220.143.218.221
1F:推 amymayyam:微积分基本定理.....140.127.179.227 07/05
2F:推 GBRS:使用积分第一均值定理...得到f(c)=1...取c=1... 60.198.69.14 07/05
3F:→ GBRS:使得f(c)=c..感觉还不够细腻..期待有高手能解出这题 60.198.69.14 07/05
4F:推 iamseed:这题够难 要设h(x)=f(x)-x 把他积分 59.115.231.136 07/05
5F:→ iamseed:然後再利用积分均值 就解出来了 59.115.231.136 07/05
6F:→ iamseed:我只能说考试的时候想的出来 就太屌了 59.115.231.136 07/05
7F:推 ericphoebe:我知道怎麽算啦220.143.218.221 07/05
8F:推 youyouyou:哈~~这个我第一次做有想出来压~ 61.229.67.2 07/05