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4 May, 10:45

If ƒ (x) = 3x + 1 and and ƒ - 1 =, then the ordered pair of ƒ - 1 (10) = (10, 31) (10, 3) (3, 10)

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  1. 4 May, 13:59
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    f (x) = 3x + 1

    y = 3x + 1

    y - 1 = 3x + 1 - 1

    y - 1 = 3x

    3 3

    ¹/₃y - ¹/₃ = x

    y = ¹/₃x - ¹/₃

    f⁻¹ (x) = ¹/₃x - ¹/₃

    f⁻¹ (10) = ¹/₃ (10) - ¹/₃

    f⁻¹ (10) = 3¹/₃ - ¹/₃

    f⁻¹ (10) = 3

    It is equal too (10, 3).
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