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  2. Step function - Wikipedia

    en.wikipedia.org/wiki/Step_function

    Step function. In mathematics, a function on the real numbers is called a step function if it can be written as a finite linear combination of indicator functions of intervals. Informally speaking, a step function is a piecewise constant function having only finitely many pieces. An example of step functions (the red graph).

  3. Spinal X-Rays – Lumbosacral & Lumbar – Procedure & Risks

    www.webmd.com/back-pain/spinal-x-ray-overview

    A spinal X-ray is a procedure that uses radiation to make detailed pictures of the bones of your spine. It can help your doctor find out what's causing your back or neck pain. A technician uses a ...

  4. Equation solving - Wikipedia

    en.wikipedia.org/wiki/Equation_solving

    Solving an equation symbolically means that expressions can be used for representing the solutions. For example, the equation x + y = 2x – 1 is solved for the unknown x by the expression x = y + 1, because substituting y + 1 for x in the equation results in (y + 1) + y = 2 (y + 1) – 1, a true statement. It is also possible to take the ...

  5. When Do I Need a Chest X-Ray for Heart Disease? - WebMD

    www.webmd.com/heart-disease/diagnosing-chest-x-ray

    It uses a small amount of radiation to produce an image of your heart, lungs, and blood vessels. Your doctor uses a chest X-ray to: Look at your chest bones, heart, and lungs. See if your ...

  6. Elementary algebra - Wikipedia

    en.wikipedia.org/wiki/Elementary_algebra

    Two-dimensional plot (red curve) of the algebraic equation . Elementary algebra, also known as college algebra, [1] encompasses the basic concepts of algebra. It is often contrasted with arithmetic: arithmetic deals with specified numbers, [2] whilst algebra introduces variables (quantities without fixed values). [3]

  7. Learn More About Dental X-Rays - WebMD

    www.webmd.com/oral-health/dental-x-rays

    X-rays should be taken to check for development of wisdom teeth. Adults with teeth. A full series of X-rays is indicated when there is evidence of dental disease or history of extensive decay. X ...

  8. Polynomial - Wikipedia

    en.wikipedia.org/wiki/Polynomial

    In mathematics, a polynomial is a mathematical expression consisting of indeterminates (also called variables) and coefficients, that involves only the operations of addition, subtraction, multiplication, and positive-integer powers of variables. An example of a polynomial of a single indeterminate x is x2 − 4x + 7.

  9. Smoothstep - Wikipedia

    en.wikipedia.org/wiki/Smoothstep

    Smoothstep. Smoothstep is a family of sigmoid-like interpolation and clamping functions commonly used in computer graphics, [1] [2] video game engines, [3] and machine learning. [4] The function depends on three parameters, the input x, the "left edge" and the "right edge", with the left edge being assumed smaller than the right edge.

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