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We will learn the notations of a function, such as, y is a function of the variable x (the value of y depends on the value of x).
Example: y is a function of x: y=f(x); f(x)=x+1
y is a function of x: y=g(x); g(x)=x^2

Next video in this series can be seen at:
https://youtu.be/wT_Q-CY8h_8