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Latest activity

  • mmm4444bot
    mmm4444bot replied to the thread Features in XenForo.
    💡 Here's a tip. When you type a smiley name, you don't need to type the entire name. Typing a colon followed by the first few letters...
  • mmm4444bot
    mmm4444bot replied to the thread Features in XenForo.
    Some of the smiley names have changed. For example, I often type :cool: for 😎 but the new name is :sunglasses: Typing :cool: now...
  • L
    lisaaa replied to the thread Binomials.
    how would i do that?
  • L
    lisaaa replied to the thread Binomials.
    Im sorry but is there any other way to do this as I have not learnt what ∑ stands for yet. Thanks
  • mmm4444bot
    mmm4444bot replied to the thread Guidelines Summary.
    ͏This post is for thread-bumps only. \; Please scroll up.
  • MarkFL
    MarkFL replied to the thread Solving inequality Please help.
    Using W|A, I find the one real root is approximately: x\approx1.74601665058591 Now, if we define: f(x)=x^4-2x^3-3x+9 We find...
  • Q
    quinn replied to the thread Hydrostatic Force Problem (Calc 2).
    Thank you for the explanation.
  • R
    RC1 replied to the thread Solving inequality Please help.
    If a max and min are also required, setting first derivative to zero will yield maxima or minima.
  • MarkFL
    No, what we have now is: dF=\rho gx\sqrt{w^2-(2(x-(d-h)))^2}\,dx where \(x_1\le x\le x_2\). Hence: F=\rho...
  • R
    RC1 replied to the thread Solving inequality Please help.
    Normally, one would try to factor or find the 4 roots of the numerator to see if there are additional critical points, in addition to...
  • topsquark
    topsquark reacted to Otis's post in the thread Logics with Haha.
    Can you try doing this? :)
  • Q
    quinn replied to the thread Hydrostatic Force Problem (Calc 2).
    Yes, so now we come to integrate (ρ ⋅ density ⋅ g ⋅ ℓ)dx over 0≤x≤36 correct?
  • MarkFL
    MarkFL replied to the thread Solving inequality Please help.
    We are finding the root of the derivative of the quartic, which is a cubic. :)
  • MarkFL
    The depth at the top of the gate (in terms of the given variables) is: x_1=d-h-\frac{w}{2} And the depth at the bottom of the gate is...
  • R
    RC1 replied to the thread Solving inequality Please help.
    There cannot be only one real root in an quartic equation. It appears to me that there are zero real roots and 4 imaginary roots.
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