Search results

  1. astrololo

    The number e as a limit

    Ok thanks it worked
  2. astrololo

    The number e as a limit

    I'm sorry if it takes time to respond, I have like several question to answer at the same and I must give this tomorrow lol Don't worry, I keep track of what I write on paper. I'll respond here if something I'm having a problem with.
  3. astrololo

    The number e as a limit

    Wait, what I just wrote was correct or not ? Am I in the right direction ?
  4. astrololo

    The number e as a limit

    OK but I'll have to take the natural logarithm right ?
  5. astrololo

    The number e as a limit

    1. Homework Statement I have lim of n > infinity (1+1/n)^n 2. Homework Equations 3. The Attempt at a Solution I know that I must use l'hospital rule and setting ln y = n ln (1+1/n) And after lim n ln (1+1/n) as n approaches infinity. After what do I do ?
  6. astrololo

    Simple circle problem involving area and circumference

    You obtian the radius. Btw why are you desesperate lol
  7. astrololo

    Simple circle problem involving area and circumference

    How ? I don't know what there is to do next.
  8. astrololo

    Simple circle problem involving area and circumference

    Ok, I need to go now. I'll answer you when I get time. I'm very sorry :/
  9. astrololo

    Simple circle problem involving area and circumference

    It's asking me specifically to use limiting process. It's a kind of introduction to calculus problem, that's why. So I can't use the technique you showed me :/
  10. astrololo

    Simple circle problem involving area and circumference

    Yeah, but Im finding my derivatives with limits because it's what's asked in the problem. And it's derivative of what to time ? Area ?
  11. astrololo

    Simple circle problem involving area and circumference

    I don't understand the question. I will get the rate of change of the the area depending of the time we're talking about.
  12. astrololo

    Simple circle problem involving area and circumference

    Yeah sorry about that : $$\frac{c}{2*\pi}$$
  13. astrololo

    Simple circle problem involving area and circumference

    Ok, so I evaluated the quotient and it gave me $$\frac{2c}{4*\pi}$$
  14. astrololo

    Simple circle problem involving area and circumference

    Ok, sorry for taking this long to continue this. Here : $$A=\frac{C^2}{4*\pi}$$
  15. astrololo

    Finding polar form of complex number

    Oh ok so its normal that I obtain two different values. Ok then, thank you!
  16. astrololo

    Finding polar form of complex number

    1. Homework Statement I have the following complex numbers : -3,18 +4,19i I must put it in polar form. 2. Homework Equations r=(a^2+b^2)^(1/2) cos x = a/r sin x = b/r 3. The Attempt at a Solution I was able to find with cos x = a/r that the x = 127,20 But when I do it with sin x = b/r I...
  17. astrololo

    Simple circle problem involving area and circumference

    Ok, I'm going to sleep for now. I'll continue tomorrow if it doesn't bother you.
  18. astrololo

    Simple circle problem involving area and circumference

    This : rate of change of area of circle = 1/2pi * Circumference Is this what you want ?
  19. astrololo

    Simple circle problem involving area and circumference

    Because the book that I'm using doesn't want us to use differentiation. I know that I could use these formulas, but I don't want too. (It's like we didn't learn them yet)
  20. astrololo

    Simple circle problem involving area and circumference

    Lim as h approaches 0 f(x+h)-f(x) divided by h I don'T understand the other question.
  21. astrololo

    Simple circle problem involving area and circumference

    1. Homework Statement A stone is thrown into still water, forming ripples which travel from the center of disturbance in the form of circles. If the circumference of the circle which bounds the disturbed area is 10 ft and the circumference is increasing at the rate of 3 ft. per second, how fast...
  22. astrololo

    Finding the focus points of a hyperbola

    Oh thank you for telling me !
  23. astrololo

    Finding the focus points of a hyperbola

    1. Homework Statement So I have the following hyperbola x^2/4 - y^2/4 = -1 I need to find the focus points of this hyperbola. What is some analytical way to do this ? Thank yoU! 2. Homework Equations I don't know... 3. The Attempt at a Solution I need some analytical way to be able to...
  24. astrololo

    Conic section equation

    ONE VERY LAST QUESTION. Is my equation in this form : y=(x^2)/2+1 in canonical form right ?
  25. astrololo

    Conic section equation

    Ok I was finally able to draw this cursed parabola. May it go to hell. thank you again for your help! This page helped me a lot : https://en.wikipedia.org/wiki/Rotation_of_axes
  26. astrololo

    Conic section equation

    Forget it, I was able to make it work. In fact, I found an easier way. I rotate one coordinate x and I replace it in my long equation to find the y. (Using worlfram to find the y)
  27. astrololo

    Conic section equation

    Hey can you try 1,3/2 for me please ? Im not sure if I did my part correctly. I obtian -(2)^(1/2)/4 although I dont think its correct
  28. astrololo

    Conic section equation

    Ok, I finally understand. We did a rotation which permitted me to identify a parabola. Now I must redo a rotation but inversly. so I found these equations : x=x'cos theta - y' sin theta Which seems to work because I obtained the correct vertex of -1/2^(1/2), 1/2^(1/2) Ill continue and see...
Top