Limits of sequences

  • A Swiss sum
    problem

    A swiss sum

    Age
    16 to 18
    Challenge level
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    Can you use the given image to say something about the sum of an infinite series?
  • Summing geometric progressions
    problem

    Summing geometric progressions

    Age
    14 to 18
    Challenge level
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    Watch the video to see how to sum the sequence. Can you adapt the method to sum other sequences?

  • Diminishing Returns
    problem

    Diminishing returns

    Age
    11 to 14
    Challenge level
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    How much of the square is coloured blue? How will the pattern continue?
  • Litov's Mean Value Theorem
    problem

    Litov's mean value theorem

    Age
    11 to 14
    Challenge level
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    Start with two numbers and generate a sequence where the next number is the mean of the last two numbers...
  • Squareness
    problem

    Squareness

    Age
    16 to 18
    Challenge level
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    The family of graphs of x^n + y^n =1 (for even n) includes the circle. Why do the graphs look more and more square as n increases?
  • Slide
    problem

    Slide

    Age
    16 to 18
    Challenge level
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    This function involves absolute values. To find the slope on the slide use different equations to define the function in different parts of its domain.
  • Light Blue - Dark Blue
    problem

    Light blue - dark blue

    Age
    7 to 11
    Challenge level
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    Investigate the successive areas of light blue in these diagrams.
  • Ruler
    problem

    Ruler

    Age
    16 to 18
    Challenge level
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    The interval 0 - 1 is marked into halves, quarters, eighths ... etc. Vertical lines are drawn at these points, heights depending on positions. What happens as this process goes on indefinitely?
  • Small Steps
    problem

    Small steps

    Age
    16 to 18
    Challenge level
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    Two problems about infinite processes where smaller and smaller steps are taken and you have to discover what happens in the limit.