Скачать или смотреть What is a function?

Understand what function are before working on them! In this video, I'll give you clear explanations and examples of functions, why they exist and how they can be useful for you even when you go to the movies or the supermarket!
All videos in this channel are made to give a chance of a brand new start in maths. Watch them in the order, do the activities!
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I'll try to post a video every few weeks.