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  2. Chegg - Wikipedia

    en.wikipedia.org/wiki/Chegg

    Purdue University prohibits students soliciting answers using Chegg's homework help: "While Chegg can be helpful to access textbooks and more practice problems, using this resource to find assignment answers is considered academic dishonesty because it is a form of copying and plagiarism.". [55]

  3. MyMathLab - Wikipedia

    en.wikipedia.org/wiki/MyMathLab

    The homework and practice exercises take advantage of an algorithm to generate problems, so students can have limitless options to practice problems. [9] Another core feature of MyMathLab is the eText book. The eText book can be viewed through a traditional computer or a mobile tablet.

  4. Course Hero - Wikipedia

    en.wikipedia.org/wiki/Course_Hero

    Subscription or content contribution is required for students to use the platform. [ 2 ] The crowdsourced learning platform contains practice problems, study guides, infographics, class notes, step-by-step explanations, essays, lab reports, videos, user-submitted questions paired with answers from tutors, and original materials created and ...

  5. Sixth power - Wikipedia

    en.wikipedia.org/wiki/Sixth_power

    64 (2 6) and 729 (3 6) cubelets arranged as cubes ((2 2) 3 and (3 2) 3, respectively) and as squares ((2 3) 2 and (3 3) 2, respectively) In arithmetic and algebra the sixth power of a number n is the result of multiplying six instances of n together.

  6. Design of experiments - Wikipedia

    en.wikipedia.org/wiki/Design_of_experiments

    The question of design of experiments is: which experiment is better? The variance of the estimate X 1 of θ 1 is σ 2 if we use the first experiment. But if we use the second experiment, the variance of the estimate given above is σ 2 /8. Thus the second experiment gives us 8 times as much precision for the estimate of a single item, and ...

  7. Principia Mathematica - Wikipedia

    en.wikipedia.org/wiki/Principia_Mathematica

    The use of dots; Definitions: These use the "=" sign with "Df" at the right end. Summary of preceding statements: brief discussion of the primitive ideas "~ p" and "p ∨ q" and "⊦" prefixed to a proposition. Primitive propositions: the axioms or postulates. This was significantly modified in the second edition.

  8. Expression (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Expression_(mathematics)

    The earliest written mathematics likely began with tally marks, where each mark represented one unit, carved into wood or stone.An example of early counting is the Ishango bone, found near the Nile and dating back over 20,000 years ago, which is thought to show a six-month lunar calendar. [6]

  9. Learning theory (education) - Wikipedia

    en.wikipedia.org/wiki/Learning_theory_(education)

    The surface structure is the way a problem is framed. The deep structure is the steps for the solution. For example, when a math story problem changes contexts from asking how much it costs to reseed a lawn to how much it costs to varnish a table, they have different surface structures, but the steps for getting the answers are the same.