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  2. Calculator input methods - Wikipedia

    en.wikipedia.org/wiki/Calculator_input_methods

    The simplest example given by Thimbleby of a possible problem when using an immediate-execution calculator is 4 × (−5). As a written formula the value of this is −20 because the minus sign is intended to indicate a negative number, rather than a subtraction, and this is the way that it would be interpreted by a formula calculator.

  3. Drake equation - Wikipedia

    en.wikipedia.org/wiki/Drake_equation

    The Drake equation is a probabilistic argument used to estimate the number of active, communicative extraterrestrial civilizations in the Milky Way Galaxy. [ 1 ] [ 2 ] [ 3 ] The equation was formulated in 1961 by Frank Drake , not for purposes of quantifying the number of civilizations, but as a way to stimulate scientific dialogue at the first ...

  4. One-repetition maximum - Wikipedia

    en.wikipedia.org/wiki/One-repetition_maximum

    The 1RM can also be estimated indirectly using repetition testing on submaximal loads, as popularized by the use of 1RM calculators. Although in many cases the estimate is reasonable, in other cases the estimate may vary by 10% or more from the actual 1RM. [3] Using a specialized formula for the specific exercise improves accuracy. [4]

  5. Numeric precision in Microsoft Excel - Wikipedia

    en.wikipedia.org/wiki/Numeric_precision_in...

    These results are not subject to round-off error, but they are not accurate unless b 2 is large compared to ac. Excel graph of the difference between two evaluations of the smallest root of a quadratic: direct evaluation using the quadratic formula (accurate at smaller b) and an approximation for widely spaced roots (accurate for larger b). The ...

  6. These Calculators Make Quick Work of Standard Math ... - AOL

    www.aol.com/best-calculators-students...

    FX-9750GII Graphing Calculator. One of our favorite graphing calculators, the Casio FX-9750GII offers a lot of machine for the money. It can handle the needs of most students all the way through ...

  7. Finite difference coefficient - Wikipedia

    en.wikipedia.org/wiki/Finite_difference_coefficient

    For the -th derivative with accuracy , there are + = ⌊ + ⌋ + central coefficients , +,...,,. These are given by the solution of the linear equation system These are given by the solution of the linear equation system

  8. Numerical analysis - Wikipedia

    en.wikipedia.org/wiki/Numerical_analysis

    The field of numerical analysis predates the invention of modern computers by many centuries. Linear interpolation was already in use more than 2000 years ago. Many great mathematicians of the past were preoccupied by numerical analysis, [5] as is obvious from the names of important algorithms like Newton's method, Lagrange interpolation polynomial, Gaussian elimination, or Euler's method.

  9. Romberg's method - Wikipedia

    en.wikipedia.org/wiki/Romberg's_method

    For the first iteration the two piece and one piece estimates are used in the formula ⁠ 4 × (more accurate) − (less accurate) / 3 ⁠. The same formula is then used to compare the four piece and the two piece estimate, and likewise for the higher estimates; For the second iteration the values of the first iteration are used in the formula ...