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Math Help - is this one to one?

  1. #1
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    is this one to one?

    If f and f composite g are one to one, does it follow that g is one to one?
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  2. #2
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    Suppose that g(a) = g(b) does it follow that f \circ g(a) = f \circ g(b)? WHY?
    Now what?
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