# XMaths - Cours et Exercices de Mathématiques

Home Page Teachers Primary Pupils Secondary Students Fun Kids Online Math Games "Sheppard offers everything from early math to pre-algebra. The lessons include interactive activities to practice concepts. Students can shoot fruit, pop balloons, and even play math man (the math version of pac man!). cocalc CoCalc does not support Firefox version 43. We recommend that you use the newest version of Google Chrome. Learn more about our browser requirements. Use CoCalc anyways with my unsupported browser...

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Factoring a Number Thinkwell PatrickJMT » Algebra, Arithmetic » Factoring a Number Factoring a Number Computer Algebra I: Mathematica, SymPy, Sage, Maxima - Hyperpolyglot a side-by-side reference sheet sheet one: grammar and invocation | variables and expressions | arithmetic and logic | strings | arrays | sets | arithmetic sequences | dictionaries | functions | execution control | exceptions | streams | files | directories | libraries and namespaces | reflection sheet two: symbolic expressions | calculus | equations and unknowns | optimization | vectors | matrices | combinatorics | number theory | polynomials | trigonometry | special functions | permutations | descriptive statistics | distributions | statistical tests bar charts | scatter plots | line charts | surface charts | chart options

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What is the Golden Ratio? – Math Memoirs – Medium The Golden Ratio has been heralded as the most beautiful ratio in art and architecture for centuries. From the Parthenon to Salvador Dali’s The Sacrament of the Last Supper the Golden Ratio has been found lurking in some of the world’s most celebrated creations. Now whether you believe this divine proportion is truly a mark of beauty or simply selection bias is up to you, but without a doubt it is one of the most intriguing numbers in existence. Phi is Golden Represented by the greek letter phi (φ), the Golden Ratio is the irrational value:

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