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For a long time, the richest men and women in the world have mainly been entrepreneurs and if business is that rewarding, why doesn't everyone just do it? This thought has come to many of us who are study...

The first thing to note about this question is that it's a simultaneous equations question, involving a quadratic. We will have to use substution in order to solve it. So first of all we need to chose whi...

When you differenciate a function, the constant term turns to 0. So a lot of different functions like x² + 7 and x² - 3 will have the same derivative, this means that going from the ...