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  2. 1 + 2 + 3 + 4 + ⋯ - ⋯ - Wikipedia

    en.wikipedia.org/wiki/1_%2B_2_%2B_3_%2B_4_%2B_%E...

    The partial sums of the series 1 + 2 + 3 + 4 + 5 + 6 + ⋯ are 1, 3, 6, 10, 15, etc.The nth partial sum is given by a simple formula: = = (+). This equation was known ...

  3. Coin problem - Wikipedia

    en.wikipedia.org/wiki/Coin_problem

    The following scores (in addition to 1, 2, and 4) cannot be made from multiples of 5 and 7 and so are almost never seen in sevens: 3, 6, 8, 9, 11, 13, 16, 18 and 23. By way of example, none of these scores was recorded in any game in the 2014-15 Sevens World Series .

  4. MathWorks Math Modeling Challenge - Wikipedia

    en.wikipedia.org/wiki/MathWorks_Math_Modeling...

    MathWorks Math Modeling Challenge (M3 Challenge) is a mathematical modeling competition open to high schools in the U.S. (including US territories and DoDEA schools) and schools with sixth form students (age 16-19) in England and Wales.

  5. Equation solving - Wikipedia

    en.wikipedia.org/wiki/Equation_solving

    The solution set of the equation ⁠ x 2 / 4 ⁠ + y 2 = 1 forms an ellipse when interpreted as a set of Cartesian coordinate pairs. Main article: Solution set The solution set of a given set of equations or inequalities is the set of all its solutions, a solution being a tuple of values, one for each unknown , that satisfies all the equations ...

  6. Mathematics - Wikipedia

    en.wikipedia.org/wiki/Mathematics

    Ecology heavily uses modeling to simulate population dynamics, [140] [141] study ecosystems such as the predator-prey model, measure pollution diffusion, [142] or to assess climate change. [143] The dynamics of a population can be modeled by coupled differential equations, such as the Lotka–Volterra equations .

  7. Order of operations - Wikipedia

    en.wikipedia.org/wiki/Order_of_operations

    [2] [3] Thus, in the expression 1 + 2 × 3, the multiplication is performed before addition, and the expression has the value 1 + (2 × 3) = 7, and not (1 + 2) × 3 = 9. When exponents were introduced in the 16th and 17th centuries, they were given precedence over both addition and multiplication and placed as a superscript to the right of ...

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