Complex numbers

  • Sheep in wolf's clothing
    problem

    Sheep in wolf's clothing

    Age
    16 to 18
    Challenge level
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    Can you work out what simple structures have been dressed up in these advanced mathematical representations?
  • Impedance can be complex!
    problem

    Impedance can be complex!

    Age
    16 to 18
    Challenge level
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    Put your complex numbers and calculus to the test with this impedance calculation.
  • Pumping the Power
    problem

    Pumping the power

    Age
    16 to 18
    Challenge level
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    What is an AC voltage? How much power does an AC power source supply?
  • Sextet
    problem

    Sextet

    Age
    16 to 18
    Challenge level
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    Investigate x to the power n plus 1 over x to the power n when x plus 1 over x equals 1.
  • Footprints
    problem

    Footprints

    Age
    16 to 18
    Challenge level
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    Make a footprint pattern using only reflections.
  • Complex partial fractions
    problem

    Complex partial fractions

    Age
    16 to 18
    Challenge level
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    To break down an algebraic fraction into partial fractions in which all the denominators are linear and all the numerators are constants you sometimes need complex numbers.
  • Complex Sine
    problem

    Complex sine

    Age
    16 to 18
    Challenge level
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    Solve the equation sin z = 2 for complex z. You only need the formula you are given for sin z in terms of the exponential function, and to solve a quadratic equation and use the logarithmic function.
  • Thousand Words
    problem

    Thousand words

    Age
    16 to 18
    Challenge level
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    Here the diagram says it all. Can you find the diagram?
  • Three by One
    problem

    Three by one

    Age
    16 to 18
    Challenge level
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    There are many different methods to solve this geometrical problem - how many can you find?