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First page of "La dioptrique" by René Descartes. La dioptrique (in English Dioptrique, Optics, or Dioptrics) is a short treatise by René Descartes. It was published in 1637 included in one of the Essays written with Discourse on the Method. In this essay Descartes uses various models to understand the properties of light.
In mathematics, the radical symbol, radical sign, root symbol, radix, or surd is a symbol for the square root or higher-order root of a number. The square root of a number x is written as
The White House, official residence of the president of the United States, in July 2008. The president of the United States is the head of state and head of government of the United States, [1] indirectly elected to a four-year term via the Electoral College. [2]
Foundation is a science fiction novel by American writer Isaac Asimov. It is the first book in the Foundation Trilogy (which later expanded into the Foundation series).
The Heritage Foundation, sometimes referred to simply as "Heritage", [1] [2] is a U.S. conservative think tank based in Washington, D.C. Founded in 1973, it took a leading role in the conservative movement in the 1980s during the presidency of Ronald Reagan, whose policies were taken from Heritage Foundation studies, including its Mandate for ...
Descartes theory of geometric solution of equations uses a parabola to introduce cubic equations, in this way it is possible to set up an equation whose solution is a cube root of two. Note that the parabola itself is not constructible except by three dimensional methods.
Graph of a cubic function with 3 real roots (where the curve crosses the horizontal axis at y = 0).The case shown has two critical points.Here the function is () = (+) = (+) (+) and therefore the three real roots are 2, −1 and −4.
Kamala Devi Harris (/ ˈ k ɑː m ə l ə ˈ d eɪ v i / ⓘ KAH-mə-lə DAY-vee [1]) (born October 20, 1964) is an American politician and attorney who has been the 49th and current vice president of the United States since 2021, serving with President Joe Biden.