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st0ne

[Mentally Stable]



Status: Offline
(since 03-09-2015 08:52)
Joined: 24 Aug 2012
Posts: 484, Topics: 57
Location: Lost through drink

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Post Posted: 21-09-2014, 11:37:44 | Translate post to: ... (Click for more languages)
Am 2 probleme.
1. Avem functia A->B->C (prima sageata este f si a doua este g)
a) daca f si g sunt injective, atunci gof este injective
b) daca f si g sunt surjective, atunci gof este surjectiva

2. Sa se arate ca functia de gradul al doilea nu este nici injectiva nici surjectiva
Teoria stiu, dar nu am facut cu profesorul suficiente exercitii la tabla...


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