Упростить выражение (a+1/a^4+a^3+a^2) / (1/a^5-a^2. Created by vallenkog. algebra-ru

a^5-a^2...

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Решение:

$\frac{a + 1}{a^{4} + a^{3} + a^{2}} : \frac{1}{a^{5} - a^{2}} = \frac{a + 1}{a^{2}(a^{2} + a + 1)} : \frac{1}{a^{2}(a^{3} - 1)} = \frac{(a + 1) *a^{2}(a^{3} - 1) }{a^{2}(a^{2} + a + 1)} = \frac{(a + 1) *(a - 1)*(a^{2} + a + 1) }{(a^{2} + a + 1)} = (a + 1) *(a - 1) = a^{2} - 1.$

Ответ: $a^{2} - 1.$

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