Recent content by Jkohn

  1. J

    Leibniz formula using mathematical induction

    ohhhhh makes sense..thanks!
  2. J

    Leibniz formula using mathematical induction

    No I dont.
  3. J

    Leibniz formula using mathematical induction

    Interesting, I didnt know of this rule..whats it called??
  4. J

    Leibniz formula using mathematical induction

    Homework Statement Here is this problem: I have the solution http://www.proofwiki.org/wiki/Leibniz%27s_Rule/One_Variable This is where I get stuck.. Where it says: 'For the first summation, we separate the case k=n and then shift the indices up by 1.' Why does this lead to the...
  5. J

    REU recommendations and feedback

    Anyone?
  6. J

    REU recommendations and feedback

    Hello all, I am not sure if I am posting in the correct place. I am currently in community college, for now I think I am doing physics. Regarding the courses for physics, am currently taking mechanics and calculus 2. Spring I will take physics 2 which I believe is electricity and magnetism as...
  7. J

    Undergrad Problems that are wrong that I must find errors

    What I want are problems that are done with errors (purposely) so that I can find those errors and correct them. I am sure there is a book out there--have not found one.
  8. J

    Undergrad Problems that are wrong that I must find errors

    Basically what I am trying to do is solve problems by finding errors in the run down of the problem. An example would be one of those proofs that 1=2, debunking them. I want to find problems like that; a lot harder and more relevant to what I am learning. Would like it for single variable...
  9. J

    Proof d/dx e^x=e^x using substitution

    well 1 implies it..wow so cool
  10. J

    Proof d/dx e^x=e^x using substitution

    ohhhhhh so 1=e^x holy ****!
  11. J

    Proof d/dx e^x=e^x using substitution

    mhm I am doing this: lim e^δ−1/ δ =1 e^δ - 1= 1/h δ=ln(1+ 1/h) so I get: limit [(1/h)]/ [ln(1+(1/h))] h-->infinity Im getting 1
  12. J

    Proof d/dx e^x=e^x using substitution

    how do I put δ in terms of h..where am I plugging it in?? EDIT: SORRY I realized h=1/(e^δ - 1) do I insert that h into the e= limit (1+ 1/h)^h ?? thanks
  13. J

    Proof d/dx e^x=e^x using substitution

    Im a bit confused here. Where are you getting the (1/h)=e^δ−1 from?
  14. J

    Proof d/dx e^x=e^x using substitution

    So what exactly should I be substituting??
  15. J

    Proof d/dx e^x=e^x using substitution

    Put that in my "attempts" he says that e^h ≠ (1+h) because its a ≈ and not =, I even told him under a certain domain "its true" he won't accept lol..