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The way by which we approach to solve a problem in life is not different than actual approach . First we identify the problem and the try to model it mathematically.It means we identify the parameters on which problem depends.These parameters are determined either experimentally or by a observation.These parameter are physical parameter and real .Some time some parameter may be imaginary but in experimental value we neglect them.For example flowing of blood in body. We know liquid flow from up word to downward but in human body it flows top to bottom as natural but bottom ( toe ) to top (head) it is some thing rea but against the concept of flow of liquid.So pressure we find as parameter for ths problem. Once parameters fixed we wish to find the solution in term of mathematics.
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