I am having trouble figuring out how to find the domains an example problem is p(x)=2x-2

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  1. R (real numbers as x can equal anything

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  2. p(x)=2x-2

    give different values for x and find p(X).Then x =domain,& p(X)=co domain

    example if x=1`,then p(X)=2.1 -2=0
    x=2. thenP(X)=2.2-2= 2

    in this case is domain is 1,2

    codomain is 0,2

    that is 1 mapped to zero
    2 mapped to 2

    hope it is clear?

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