Автор - Naz2121

f(x)= frac{2x-3}{x+4}

f^{l}(-5) -?

Ответ

Проверено экспертом

Автор - Evgenia4836

f'= ((2x-3)'(x+4)-(2x-3)(x+4)')/(x+4)²= (2(x+4)-(2x-3))/(x+4)²= (2x+8-2x+3)/(x+4)²= 11/(x+4)²

f'(-5)= 11/(-5+4)²= 11

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