If g ∘f is surjective, then g is surjective. | Numerade

SOLVED: Using the precise definition of a function and a little logic, show that for every set Y there is exactly one function f from to Y When is injective? Surjective? Let X be a set. Show that there are either no functions from X to Ol' exactly one Such funetion, depending OH whether X = 0 Ol' X =0

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consider sets a and b with a8 and b6 how many functions fab are surjective 85456

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