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  2. Heaviside cover-up method - Wikipedia

    en.wikipedia.org/wiki/Heaviside_cover-up_method

    Set up a partial fraction for each factor in the denominator. With this framework we apply the cover-up rule to solve for A, B, and C. D 1 is x + 1; set it equal to zero. This gives the residue for A when x = −1. Next, substitute this value of x into the fractional expression, but without D 1. Put this value down as the value of A.

  3. Factorial - Wikipedia

    en.wikipedia.org/wiki/Factorial

    For example, 9!! = 1 × 3 × 5 × 7 × 9 = 945. Double factorials are used in trigonometric integrals, [92] in expressions for the gamma function at half-integers and the volumes of hyperspheres, [93] and in counting binary trees and perfect matchings. [91] [94] Exponential factorial

  4. Fractional factorial design - Wikipedia

    en.wikipedia.org/wiki/Fractional_factorial_design

    Each generator halves the number of runs required. A design with p such generators is a 1/(l p)=l −p fraction of the full factorial design. [3] For example, a 2 52 design is 1/4 of a two-level, five-factor factorial design. Rather than the 32 runs that would be required for the full 2 5 factorial experiment, this experiment requires only ...

  5. Stirling's approximation - Wikipedia

    en.wikipedia.org/wiki/Stirling's_approximation

    [1] [2] [3] One way of stating the approximation involves the logarithm of the factorial: ⁡ (!) = ⁡ + (⁡), where the big O notation means that, for all sufficiently large values of , the difference between ⁡ (!

  6. Double factorial - Wikipedia

    en.wikipedia.org/wiki/Double_factorial

    Unrooted binary trees with ⁠ n + 5 / 2 ⁠ labeled leaves. Each such tree may be formed from a tree with one fewer leaf, by subdividing one of the n tree edges and making the new vertex be the parent of a new leaf. Rooted binary trees with ⁠ n + 3 / 2 ⁠ labeled leaves. This case is similar to the unrooted case, but the number of edges ...

  7. Daughter Admits She Used to Throw Plates Away Rather Than ...

    www.aol.com/daughter-admits-she-used-throw...

    Related: Woman No Longer Cooks Husband Dinner After He Refuses to Do Dishes: 'He Can Handle His Own' Later in the video, Sam dropped a big bombshell as she admitted she once faked a health crisis. ...

  8. We May Know Why Reba McEntire Is Leaving 'The Voice' for ...

    www.aol.com/lifestyle/may-know-why-reba-mcentire...

    This means, Reba will likely spend some time filming new episodes while awaiting a season 2 pickup from NBC. For those wondering what Happy's Place is about, ...

  9. Lenovo plans global factory expansion as Q2 results beat ...

    www.aol.com/news/lenovo-q2-revenue-jumps-24...

    Lenovo's global PC shipments rose 3% to 16.5 million units in the September quarter, maintaining its commanding 24% market share. Across the industry, global PC shipments fell 2.4% from a year ...