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When you differentiate, the constant disappears, because it is not dependent of the variable. So when you integrate, you have to add the constant again. However, you can't know the vaulue of c without ...

For all quadratic equations, you can use the quadratic formula. Given an equation of the form ax²+bx+c, you can plug those va...

The multiplier effect occurs within the circular flow of money, more precisely when people earn income and spend a proportion of what they have earned. When the government invests in infrastructure (fo...

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Im Juli habe ich eine gute Freundin in Frankfurt besucht. Wir kennen uns schon seit ein paar Jahren und haben immer viel Spaß zusammen. Wir waren im Schwim...

In Italian, if you are speaking to a person you do not know very well or who is you "superior", say your professor at university or your supervisor at work or your boss, you should not addres...