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bahrom7893

  • 4 years ago

Find the sum of the series. For what variables of x will this series converge?

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  1. bahrom7893
    • 4 years ago
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    3+x+x^2+x^3+.... idk what to do about that 3

  2. mathg8
    • 4 years ago
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    3x^0 ?

  3. bahrom7893
    • 4 years ago
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    well but the next one should have been 3x and then 3x^2, etc

  4. mathg8
    • 4 years ago
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    i see ...

  5. bahrom7893
    • 4 years ago
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    @TuringTest any ideas?

  6. bahrom7893
    • 4 years ago
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    hmmm let me read through the book once more..

  7. mathg8
    • 4 years ago
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  8. bahrom7893
    • 4 years ago
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    what's that?

  9. mathg8
    • 4 years ago
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    doesn't converge

  10. mathg8
    • 4 years ago
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    By the limit test, the series does not converge.

  11. bahrom7893
    • 4 years ago
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    It should though, for some values of x

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  12. bahrom7893
    • 4 years ago
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    #22.

  13. Ishaan94
    • 4 years ago
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    x<1 ?

  14. bahrom7893
    • 4 years ago
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    im thinking partial sums or smth..

  15. mathg8
    • 4 years ago
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    I need a refresh ... rusty

  16. bahrom7893
    • 4 years ago
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    well yea but i gotta find an equation for Sum. and i can't figure out what a is

  17. mathg8
    • 4 years ago
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    http://www.wolframalpha.com/input/?i=3%2Bx%2Bx%5E2%2Bx%5E3%2B....

  18. bahrom7893
    • 4 years ago
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    or the other side could be like ((1/3)x)

  19. Ishaan94
    • 4 years ago
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    \[3 + \frac{x}{1-x}\] It only works if x<1

  20. bahrom7893
    • 4 years ago
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    math, wolf can't compute this in terms of x. ohhhhhhhhhhhhhh Ishaain u're right.

  21. Ishaan94
    • 4 years ago
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    And I am sure the series will converge only when x<1

  22. bahrom7893
    • 4 years ago
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    *Ishaan

  23. bahrom7893
    • 4 years ago
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    actually im not sure now

  24. mathg8
    • 4 years ago
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    you should try partial sums ...

  25. bahrom7893
    • 4 years ago
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    that 3 is still bothering me.

  26. mathg8
    • 4 years ago
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    what if you divide by 3?

  27. bahrom7893
    • 4 years ago
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    then a get's screwed 1+(1/3)x+(1/3)x^2, etc..

  28. bahrom7893
    • 4 years ago
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    *gets

  29. bahrom7893
    • 4 years ago
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    @radar can u take a look?

  30. bahrom7893
    • 4 years ago
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    hmm what if i start with x

  31. bahrom7893
    • 4 years ago
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    duhh that's ishaan's answer, he was right. Thanks guys!

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