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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- Apr 14th 2007, 10:54 AMruproteinoneto-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. - Apr 14th 2007, 11:21 AMPlato
You have not stated that correctly.

See the attached file for a proof. - Apr 14th 2007, 12:12 PMruprotein
thank uu