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There are many methods to check it, but the the most useful is: By comparison: if we find a series whose terms are greater than the given ones which is known to be convergent (an armonic series for exampl...

Sometimes it would be enough to factorise the polynomials (in case the limit we are trying to compute is writen in terms of polynomials) and eliminate common factors in the quotient. However, most of them...

There are, mainly, three ways of doing it easily:
Substitution: It consists in modifying one of the equations in such a way that x is expressed in terms of y  (or y in terms of x) and then substitut...

1/6 * (4x+3)^3/2

Imaginary numbers can seem very daunting when you first encounter them. The name is the most confusing part; how can a number be imaginary? Do imaginary numbers really exist? You can think of the set of i...