Other Math Archive: Questions from August 17, 2023
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Ejercicio 13 Demuestre que \\( 1+\\cos \\theta+\\cdots+\\cos n \\theta=\\frac{1}{2}+\\frac{\\sin \\left(n \\theta+\\frac{\\theta}{2}\\right)}{2 \\sin \\left(\\frac{\\theta}{2}\\right)} \\), donde \\(2 answers -
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suelve \\( y \\frac{d x}{d y}=x+4 y e^{-2 x / y} \\) \\[ \\frac{1}{2} e^{2 x / y}=\\ln \\mid y+c \\] \\[ 2 e^{2 x y}=8 \\ln |y|+c \\] \\[ e^{2 x y}=8 \\ln \\mid y+c \\] \\[ 4 e^{2 x y}=2 \\ln |y|+c \\2 answers -
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