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Автор - Sovits

Помогите, пожалуйста, найти производную этой неявной функции.y=x^{-tgx}

Ответ

Проверено экспертом

Автор - NNNLLL54

y=x^{-tgx}\\lny=ln(x^{-tgx})\\lny=-tgxcdot lnx\\(lny)'=(-tgxcdot lnx)'\\frac{y'}{y}=-frac{1}{cos^2x}cdot lnx-tgxcdot frac{1}{x}\\y'=ycdot (-frac{1}{cos^2x}cdot lnx-tgxcdot frac{1}{x})\\y'=x^{-tgx}cdot (-frac{lnx}{cos^2x}-frac{tgx}{x})

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