Автор - Marilema

найдите значение выражения f'(-2)+f'(-4) ,где f(x)=(2x-1)/(x+3)

Ответ

Автор - Zhiraffe
f'(x)=(2*(x+3)-1*(2x-1))/(x+3)^2=(2x+6-2x+1)/(x+3)^2=7/(x+3)^2

f'(-2)+f'(-4)=\ 7/(-2+3)^2+7/(-4+3)^2=\ 7+7=14

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