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Algebra problems selected from the Romanian Olympiad (Part 2)

41 点作者 argulane大约 1 年前

4 条评论

ykonstant大约 1 年前
The hint for problem 5 misses the essence a bit; the inequalities you &quot;need&quot; are:<p>1) Squares of reals are non-negative;<p>2) integers cannot be strictly between 0 and 1.<p>Indeed, these two facts, masqueraded in various tricky ways, form the basis for transcendental number theory.
Rinzler89大约 1 年前
It&#x27;s a shame the school system doesn&#x27;t put more emphasis on why you&#x27;d need to solve such difficult problems in the real world, as in, what are their theoretical or practical applications of the knowledge gained from solving such problems.<p>Most high-school students grinding for the national Olympiads are doing it to get into top universities later, but have no idea about the applications of what they&#x27;re working on, they just grind away.<p>It&#x27;s also one of the reason I never like complex math in school, because I never saw the point for it, so early in our education. Only later in life when I had to write SW for vehicle dynamics I understood the need but it&#x27;s not something you run into while in school.
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mkup大约 1 年前
Problem 5 has a simpler geometric solution, it&#x27;s enough to plot circle of radius sqrt(2) on the Oab plane and a few lines b=-a, b=-a+1, b=-a+2, b=-a-1, b=-a-2 to observe the intersections. The rest of the lines are too far from this circle to intersect with it.
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konstantinua00大约 1 年前
in problem 2, what does star in R^*_+ mean?
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