• Support PF! Buy your school textbooks, materials and every day products via PF Here!

Integration help

  • Thread starter confused88
  • Start date
1. The problem statement, all variables and given/known data
Can Someone Please Help me integrate the following please...


2. Relevant equations
- [tex]\int[/tex] x^11 e^x [tex]/[/tex] 5x^6


3. The attempt at a solution
firstly i simplified it to...

-1/5 [tex]\int[/tex] x^5 e^x [tex]/[/tex] 5

Then i did integration by parts,
u = x^5, du = 5x^4, v= e^x, dv= e^x

So i got,

-1/5 [ x^5 e^x [tex]\int[/tex] e^x 5x^4 + C

-1/5 [x^5 e^x - x^5 e^x + C ]

= -1/5C


And this seems insanely wrong :(

Please let me know what I'm doing wrong
 
56
0
[tex]\int[/tex]5x[tex]^{4}[/tex]e[tex]^{x}[/tex]dx [tex]\neq[/tex] x[tex]^{5}[/tex]e[tex]^{x}[/tex]+C

You're going to have to use integration by parts a few more times...
 
Is there an easier way to do it? Or is integration by parts the only way?
 
56
0
I'd say integration by parts is the best way if not the only way. It will be good practice! Good luck and remember to have fun :)
 
hehe okies thanks!!
 

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving
Top