Why two Integrate results of same eq. are different?
- To: mathgroup at smc.vnet.net
- Subject: [mg44687] Why two Integrate results of same eq. are different?
- From: "Sung Jin Kim" <kimsj at mobile.snu.ac.kr>
- Date: Fri, 21 Nov 2003 05:13:10 -0500 (EST)
- Reply-to: <kimsj at mobile.snu.ac.kr>
- Sender: owner-wri-mathgroup at wolfram.com
Dear all,
I got very extraordinary results today from below two same integrals
except one is symbolic one and the other is numeric one:
A. In[1]= N[Integrate[ Log[2, 1 + 10*x]*Exp[-x]*x, {x, 0, Infinity}]]
Out[1]= -3.77002
B. In[2]= NIntegrate[ Log[2, 1 + 10*x]*Exp[-x]*x, {x, 0, Infinity}]
Out[2]= 4.05856
Why did I got the different results of these, surprisingly?
Thank you in advance!
---
Sung Jin Kim
A member of MCL in SNU: kimsj at mobile.snu.ac.kr,
A MTS of i-Networking Lab in SAIT: communication at samsung.com