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22 September, 05:36

If f (x) = 2-x^ (1/2) and g (x) = x^2-9 what is the domain of g (x) - f (x)

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  1. 22 September, 07:19
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    g (x) - f (x) = x^2 - 9 - (2 - x^1/2)

    = x^2 + x^1/2 - 11

    negative x gives no real value for this function because x^1/2 is not defined for negative x

    the domain is x > = 0 or in interval notation [0, ∞)
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