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23 March, 23:20

If a (x) is 3x+1 and b (x) is x-4 what is the domain of (b•a) (x)

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  1. 23 March, 23:24
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    (b. a) (x) = b (a (x)) = b (3x+1)

    = 3x+1 - 4 = 3x - 3 = 3 (x-1)

    domain of b (a (x)) is domain of a (x) that is all real numbers
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