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amistre64

  • 5 years ago

Whats the integral of ln(x+2)? Im thinking its along the same lines as ln(x)...

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  1. amistre64
    • 5 years ago
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    x ln(x+2) - x + C .... maybe?

  2. anonymous
    • 5 years ago
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    let u = x + 2

  3. anonymous
    • 5 years ago
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    The way i am looking at it would end up as (1/x+2)

  4. amistre64
    • 5 years ago
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    zbay, thats derivative I think ;)

  5. myininaya
    • 5 years ago
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    let u=x+2. so du=dx. therefore we have int(lnu)=u(lnu)-u

  6. anonymous
    • 5 years ago
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    <---- I am a big dummy 8(

  7. amistre64
    • 5 years ago
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    when the sign say push, you pull right ;)

  8. myininaya
    • 5 years ago
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    =(x+2)ln[x+2]-(x+2)+c

  9. anonymous
    • 5 years ago
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    You're on to me already

  10. amistre64
    • 5 years ago
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    myin, thanx; thats what I was thinking...

  11. myininaya
    • 5 years ago
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    you're welcome

  12. amistre64
    • 5 years ago
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    hows this look?

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  13. myininaya
    • 5 years ago
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    looks fine. I would have just a u substitution. let u=x+2 so du=dx Since u=x+2 then x=u-2 which if we multiply by 6 we have 6x=6(u-2). so we have int(6(u-2)/u,u)=6int(1-2/u,u)=6int(1,u)-6int(2/u,u)=6u-12lnu+C =6(x+2)-12(x+2)+C

  14. myininaya
    • 5 years ago
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    oops thats suppose to read 6(x+2)-12ln(x+2)+C

  15. amistre64
    • 5 years ago
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    .... i still need a looooottt of practice with integrals ;) thanx

  16. myininaya
    • 5 years ago
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    you're super smart amistre. where do you go to college?

  17. amistre64
    • 5 years ago
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    down here in florida; at the local community college

  18. amistre64
    • 5 years ago
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    finally get to take calc1 and stats during the summer.... if the class dont get canceled that is

  19. myininaya
    • 5 years ago
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    mathematics is a huge. i still don't know alot of it, and I have a masters

  20. amistre64
    • 5 years ago
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    :) I am working on my masters in math.... i figure at least 4 more years ..

  21. myininaya
    • 5 years ago
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    I want to get my phd in applied science. I am going to do a research in cryptography with someone in the computer science department who knows less math than me, so it should be interesting since I don't know alot of computer science. I'm mainly interested in the theory of computer science.

  22. amistre64
    • 5 years ago
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    thats sounds fun :) I had started out thinking of getting a computer degree since I write my own programs... but math is my best subject since I was a kid :)

  23. myininaya
    • 5 years ago
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    me too

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