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28 July, 16:36

If (c) were f (k) = - 3/k+2, what value of k would be excluded from the domain?

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  1. 28 July, 17:43
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    k = - 2 is excluded from the domain

    the denominator of f (x) cannot be zero as this would make f (x) undefined. Equating the denominator to zero and solving gives the value that k cannot be

    solve k + 2 = 0 ⇒ k = - 2 ← excluded value
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