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For starters, it increases the health of the people, which supports the idea of building a great nation. Another is that it represents your country in foreign competitions and shows what your culture is like. Another is that it supports the economy by having tourists or foreign athletes visit tournaments hosted by your country. The fourth can be that it brings everyone together, regardless of race, gender, social status, and builds a tolerant society.
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I dont know what you mean
A(x,y) b(x,y) slope is y-y\x-x
so Ay-BY/AX-BX
d-0\0-d
d/-d=-1
