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Yahoo! Group Title

1+2+4+8+16+32.............. = ? Find the Sum

  • 2 years ago
  • 2 years ago

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  1. DhopeChickita Group Title
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    64, 128,256,512

    • 2 years ago
  2. Yahoo! Group Title
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    1 (1+2+4+8+16+32.............. ) (2-1)(1+2+4+8+16+32.............. ) = 2 + 4 +8+ 16 +32 ....... -1-2-4-8-16-32.......... = -1

    • 2 years ago
  3. DHASHNI Group Title
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    its infinity

    • 2 years ago
  4. Yahoo! Group Title
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    Lol...i knw....Nw tell me wats the wrong in my sloution

    • 2 years ago
  5. DHASHNI Group Title
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    huh they haven't given the last term and btw its basically a geometric progression

    • 2 years ago
  6. Yahoo! Group Title
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    Do u Find any mistake in the way i did....

    • 2 years ago
  7. DHASHNI Group Title
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    yeah !!!!! there is a mistake in ur where did that -1 come from????

    • 2 years ago
  8. Yahoo! Group Title
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    2-1 = 1...................lol

    • 2 years ago
  9. mayankdevnani Group Title
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    limit help....

    • 2 years ago
  10. mayankdevnani Group Title
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    ... 4, 8, 16, 32 ... 512 or 4(1), 4(2), 4(4), 4(8), ... , 4(128) or 4(2^0), 4(2^1), 4(2^2), 4(2^3), ... , 4(2^7) S(n) = 4 ∑ 2^k [ k = 0 to n ] ....... = 4 [ 2^(n+1) - 1 ] S(7) = 4 [ 2^(7+1) - 1 ] ....... = 1020

    • 2 years ago
  11. Yahoo! Group Title
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    Lol....i dont need the answer..) i want to knw is there any mistake in my solution

    • 2 years ago
  12. mayankdevnani Group Title
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    don't angry @Yahoo! it's my limit

    • 2 years ago
  13. Yahoo! Group Title
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    lol....i am not angry ...this is a Funny....question....

    • 2 years ago
  14. mayankdevnani Group Title
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    just apply my method and get the answer

    • 2 years ago
  15. DHASHNI Group Title
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    @Yahoo! : its not that let the series be A by ur terms => (2-1)A =>2A -A =A

    • 2 years ago
  16. Yahoo! Group Title
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    oho...Again..... Tell me is there any wrong...lol

    • 2 years ago
  17. DHASHNI Group Title
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    got it!!!!

    • 2 years ago
  18. mayankdevnani Group Title
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    \[\Huge{\bf{\color{blue}{i know you can }\color{red}{doit}}}\]

    • 2 years ago
  19. furnessj Group Title
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    I hate these! I can't see see what is wrong but obviously there is something as it should total infinity... I would just do the 2-1 in the bracket and get the same answer... (is it not that there will always be one last term in the positive set of numbers which is much bigger than its negative counterpart in that set, and eventually that is infinity..?)

    • 2 years ago
  20. Yahoo! Group Title
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    1 (1+2+4+8+16+32.............. ) (2-1)(1+2+4+8+16+32.............. ) = 2 + 4 +8+ 16 +32 ....... -1-2-4-8-16-32.......... = -1

    • 2 years ago
  21. furnessj Group Title
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    Also... first terms, 2-1 = 1, second terms: 4-2 = 2, so you DO get the original series back, and it does NOT equal -1.

    • 2 years ago
  22. DHASHNI Group Title
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    2+4+8+16+32..................+2n 1+2+4+8+16+32............. + n {subtracting} ----------------------------- 1+2+4+8+16 +32+...........n

    • 2 years ago
  23. Yahoo! Group Title
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    take make sense @DHASHNI

    • 2 years ago
  24. DHASHNI Group Title
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    WAT!!!

    • 2 years ago
  25. Yahoo! Group Title
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    *that

    • 2 years ago
  26. Yahoo! Group Title
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    Sorry

    • 2 years ago
  27. furnessj Group Title
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    exactly @DHASHNI ! have a medal too :)

    • 2 years ago
  28. CliffSedge Group Title
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    You are subtracting sets of different cardinality. That's like adding unlike terms, you can't do it.

    • 2 years ago
  29. UnkleRhaukus Group Title
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    1 (1+2+4+8+16+32.............. ) (2-1)(1+2+4+8+16+32.............. ) = (2 + 4 +8+ 16 +32 +64+......)+( -1-2-4-8-16 -32 .........) = 63+.....

    • 2 years ago
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