"Whether the function is YES", here it begins most mathematics lessons. A former student told me that it stressed it exciting thing I intend to avoid beginning this exercise. If you do not understand that mathematics is a tool for other subjects as abstract plans after they get some results, which have applications in practice, then you have every right to "not stress" (!). Determined to make you understand the concept of function and means the study of functions, we start to work. Views:
Professor Ioan Ursu Romania;
Professor Ioan Ursu Romania;
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