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Maths!

Discussion in 'Forum Games' started by AZUK, Apr 8, 2011.

Runescape

Should this Forum Game stay or be closed?

  1. Stay

    35 vote(s)
    77.8%
  2. Close

    10 vote(s)
    22.2%
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    CedvitaGO2 Elite Ogre The Pit

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    7x7x0+(-3): (-1)+3=?
     
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    8+12:2-(-3+3x0) +6 =?
     
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    6+9*(8+9/3)-3
     
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    Guts DA BIG CLUB The Pit

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    x+2y=25
    2x-y=15
    find x and y very easy one for starts :p
     
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    Xicor97 Banned The Pit

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    x=15,y=5

    999-669-786^10+50
     
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    4.17731283563 10^543

    lim x → 2 [(7x²-14x) / (2-x)]
     
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    Grawl MLG King Ogre Veteran

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    2x2x2x2x2x2x2+2+2+2+2+2+2
     
  11. Snowy

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    Answer to that was -14.

    Problem: lim x → 2 [(7x²-14x) / (2-x)]

    If we substitute 2 into the equation: We get 0/0 which is indeterminate... so,

    Step 1 (Factor): (7x²-14x) to get 7x(x-2).
    Step 2 (Express): (2-x) as (-x+2) then factor the negative out to get -(x-2).

    Now we have: lim x → 2 [7x(x-2) / -(x-2)]

    Step 3 (Cross out): (x-2) from the numerator and denominator.

    Now we have: lim x → 2 [7x / -1]...
    which is lim x → 2 [-7x].

    Step 4 (Plug in 2 from our limit of x): -7(2) = -14

    140

    Solve for y:
    y = sqrt(2sin²(π/2) + 2cos²(π/2)) * e^πi

    Note: π is pi
     
    Last edited: Oct 28, 2017

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