🔴Exercise 9--TD1: Function Composition: Injectivity and Surjectivity Explained Simply 🔁
24:50
YouTubeMaths et Concours
🔴Exercise 9--TD1: Function Composition: Injectivity and Surjectivity Explained Simply 🔁
Dans cette vidéo, on étudie la composition de deux fonctions 𝑔∘𝑓 g∘f et on répond à deux questions essentielles : 1️⃣ Si 𝑔∘𝑓 g∘f est injective, que peut-on dire de 𝑓? ️ On démontre que g∘f injective ⇒ f injective, mais la réciproque est fausse. 2️⃣ Si 𝑔∘𝑓 g∘f est surjective, que peut-on dire ...
208 views5 months ago
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