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Math Help - oneto-one and onto composition proof for lin alg

  1. #1
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    oneto-one and onto composition proof for lin alg

    can sum1 help me solve this

    PROVE.
    Suppose that f: M -> N and g: N->P are mappings, where M, N AND P ARE SETS. Show that if (g o f) t(his is the compositon notation), then f is
    1-1 and g is onto.
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  2. #2
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    You have not stated that correctly.
    See the attached file for a proof.
    Attached Files Attached Files
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  3. #3
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    thank uu
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