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Автор - Sunshine1408

Помогите, пожалуйста
Найти значение производной

Ответ

Автор - Vopoxov

Пошаговое объяснение:

:  : ( frac{u}{v} )' =  frac{u'v - uv'}{v {}^{2} }  \y =  frac{7x -  {x}^{2} }{x - 3} \  y'  =  frac{(7x -  {x}^{2}) '(x - 3) - (7x -  {x}^{2})(x - 3)'}{ {(x - 3)}^{2} }   \ y'  =  frac{(7-  2{x}) (x - 3) - (7x -  {x}^{2})(1 - 0)}{ {(x - 3)}^{2} }  \ y'  =  frac{(7x-  2{x} ^{2}  - 21 + 6x) - (7x -  {x}^{2})}{ {(x - 3)}^{2} }\ y'  =  frac{ - {x} ^{2}  + 6x - 21}{ {(x - 3)}^{2} }

Можно записать след.образом

y'  =  frac{ -( {x} ^{2}   -  6x + 21)}{ {(x - 3)}^{2} } \ y'  =  frac{ -( {x} ^{2}   -  6x + 9 + 12)}{ {(x - 3)}^{2} } \ y'  =  frac{ - {(x - 3)} ^{2}   -  12}{ {(x - 3)}^{2} } \ y'  =  - 1 -  frac{ 12}{ {(x - 3)}^{2} }

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