(int )_(0)^a(x)^2sqrt ({a)^2-(x)^2}dx(agt 0)

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(1) (int )_(0)^a(x)^2sqrt ({a)^2-(x)^2}dx(agt 0);

(1) (int )_(0)^a(x)^2sqrt ({a)^2-(x)^2}dx(agt 0);

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    (int )_(0)^sqrt (2)sqrt (2-{x)^2}dx

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    (8) (int )_(0)^1(x)^2sqrt (1-{x)^2}dx :

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    int_(0)^a (x^2sqrt(a^2-x^2)),(rm dx)(a>0)$\int_{0}^{a} {x^2\sqrt{a^2-x^2}}\,{\rm

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