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6 September, 19:56

If ƒ (a) = K, then which of the following must be true?

Answer choices:

1. ƒ (K) = a

2. ƒ - 1 (K) = a

3. ƒ - 1 (a) = K

+3
Answers (2)
  1. 6 September, 20:14
    0
    Number 2 is the correct answer
  2. 6 September, 20:19
    0
    F (a) = k

    means

    when you input a, in f (x), you get k

    lets see

    1., this is false, unless f (x) = x which is not always true

    2. this is the inverse, this is the sme function but input and output are switched

    f (a) = k turns to f⁻¹ (k) = a

    true

    3. this is true only if f (x) = x

    2 is the right answer
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