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    IB Math AAHL
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    Function Theory
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    Function Theory

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    IB: 4
    1

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    The graph of y=g(x) is shown in the following for −3≤x≤5.

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    1. Write down the value of g(3)

      [1]
    2. Find the value of

      1. (g∘g)(5)

        [2]
      2. (g−1∘g−1)(1)

        [1]
    3. Sketch the graph of y=g(x+1)−1 on the axes above.

      [2]
    2

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    Consider the functions f(x)=x3−1 and g(x)=2−3x.

    1. Write down the value of g−1(−7).

      [1]

    Let h(x)=(g∘f)(x)

    1. Find an expression for h(x).

      [2]
    2. Find h−1(−19).

      [3]
    3

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    0 / 7

    The graph of y=g(x), for −3≤x≤3, is shown in the following diagram.


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    1. Write down the value of

      1. g(−2)

        [1]
      2. g−1(2)

        [1]
      3. g∘g(0)

        [1]
    2. Sketch the graph of y=−g(−x) on the graph above.

      [4]
    4

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    0 / 4

    The functions f, g and h are defined by f(x)=1−x, g(x)=3x+2, and h(x)=g∘f(x).

    1. Find an expression for h(x).

      [2]
    2. Find h−1(x).

      [2]
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    Lessons

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    Thumbnail for Functions and their properties

    Domain and range of functions, function as a model, interval notation

    Functions and their properties

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    Graphing functions with a calculator, characteristics of a function, even and odd functions, x and y intercepts, horizontal and vertical asymptotes, maxima and minima

    Function Graphs
    Thumbnail for Function Composition & Inverses

    Composing functions, inverse functions, graphing and evaluating inverse functions, computing inverses and domain restrictions

    Function Composition & Inverses (Plus Only)