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kuKareKu1231
@kuKareKu1231
December 2021
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Вычислить производные первого порядка:
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lumonces
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Ответ:
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в)![y' = \frac{1}{3} * \frac{(2x^2-x-1)'*\sqrt{4x+2} - (2x^2-x-1)*(\sqrt{4x+2})' }{(\sqrt{4x+2})^2} = \frac{1}{3} * \frac{(4x - 1)*\sqrt{4x+2} - (2x^2-x-1)*\frac{1}{2\sqrt{4x+2} }*4 }{4x+2} = \\= \frac{1}{3} * \frac{(4x-1)*\sqrt{4x+2} - \frac{2(2x^2-x-1)}{\sqrt{4x+2}} }{4x+2} = \frac{1}{3} * \frac{\frac{(4x-1)(\sqrt{4x+2})^2-2(2x^2-x-1)}{\sqrt{4x+2}}}{4x+2} = \\= \frac{1}{3} * \frac{\frac{(4x-1)*(4x+2)-4x^2+2x+2} {\sqrt{4x+2}}}{4x+2} = \frac{1}{3}*\frac{16x^2+8x-4x-2 - 4x^2+2x+2}{(4x+2)*\sqrt{4x+2}} = y' = \frac{1}{3} * \frac{(2x^2-x-1)'*\sqrt{4x+2} - (2x^2-x-1)*(\sqrt{4x+2})' }{(\sqrt{4x+2})^2} = \frac{1}{3} * \frac{(4x - 1)*\sqrt{4x+2} - (2x^2-x-1)*\frac{1}{2\sqrt{4x+2} }*4 }{4x+2} = \\= \frac{1}{3} * \frac{(4x-1)*\sqrt{4x+2} - \frac{2(2x^2-x-1)}{\sqrt{4x+2}} }{4x+2} = \frac{1}{3} * \frac{\frac{(4x-1)(\sqrt{4x+2})^2-2(2x^2-x-1)}{\sqrt{4x+2}}}{4x+2} = \\= \frac{1}{3} * \frac{\frac{(4x-1)*(4x+2)-4x^2+2x+2} {\sqrt{4x+2}}}{4x+2} = \frac{1}{3}*\frac{16x^2+8x-4x-2 - 4x^2+2x+2}{(4x+2)*\sqrt{4x+2}} =](https://tex.z-dn.net/?f=y%27%20%3D%20%5Cfrac%7B1%7D%7B3%7D%20%2A%20%5Cfrac%7B%282x%5E2-x-1%29%27%2A%5Csqrt%7B4x%2B2%7D%20%20-%20%282x%5E2-x-1%29%2A%28%5Csqrt%7B4x%2B2%7D%29%27%20%7D%7B%28%5Csqrt%7B4x%2B2%7D%29%5E2%7D%20%3D%20%5Cfrac%7B1%7D%7B3%7D%20%2A%20%5Cfrac%7B%284x%20-%201%29%2A%5Csqrt%7B4x%2B2%7D%20-%20%282x%5E2-x-1%29%2A%5Cfrac%7B1%7D%7B2%5Csqrt%7B4x%2B2%7D%20%7D%2A4%20%20%7D%7B4x%2B2%7D%20%3D%20%5C%5C%3D%20%5Cfrac%7B1%7D%7B3%7D%20%2A%20%5Cfrac%7B%284x-1%29%2A%5Csqrt%7B4x%2B2%7D%20-%20%5Cfrac%7B2%282x%5E2-x-1%29%7D%7B%5Csqrt%7B4x%2B2%7D%7D%20%7D%7B4x%2B2%7D%20%3D%20%5Cfrac%7B1%7D%7B3%7D%20%2A%20%5Cfrac%7B%5Cfrac%7B%284x-1%29%28%5Csqrt%7B4x%2B2%7D%29%5E2-2%282x%5E2-x-1%29%7D%7B%5Csqrt%7B4x%2B2%7D%7D%7D%7B4x%2B2%7D%20%3D%20%5C%5C%3D%20%5Cfrac%7B1%7D%7B3%7D%20%2A%20%5Cfrac%7B%5Cfrac%7B%284x-1%29%2A%284x%2B2%29-4x%5E2%2B2x%2B2%7D%20%7B%5Csqrt%7B4x%2B2%7D%7D%7D%7B4x%2B2%7D%20%3D%20%5Cfrac%7B1%7D%7B3%7D%2A%5Cfrac%7B16x%5E2%2B8x-4x-2%20-%204x%5E2%2B2x%2B2%7D%7B%284x%2B2%29%2A%5Csqrt%7B4x%2B2%7D%7D%20%3D)
![= \frac{1}{3} * \frac{12x^2+6x}{(4x+2)\sqrt{4x+2} } = \frac{1}{3} * \frac{6x(2x+1)}{2(2x+1)*\sqrt{4x+2} } = \frac{1}{3} * \frac{3x}{\sqrt{4x+2}} = \frac{x}{\sqrt{4x+2}} = \frac{1}{3} * \frac{12x^2+6x}{(4x+2)\sqrt{4x+2} } = \frac{1}{3} * \frac{6x(2x+1)}{2(2x+1)*\sqrt{4x+2} } = \frac{1}{3} * \frac{3x}{\sqrt{4x+2}} = \frac{x}{\sqrt{4x+2}}](https://tex.z-dn.net/?f=%3D%20%5Cfrac%7B1%7D%7B3%7D%20%2A%20%5Cfrac%7B12x%5E2%2B6x%7D%7B%284x%2B2%29%5Csqrt%7B4x%2B2%7D%20%7D%20%3D%20%5Cfrac%7B1%7D%7B3%7D%20%2A%20%5Cfrac%7B6x%282x%2B1%29%7D%7B2%282x%2B1%29%2A%5Csqrt%7B4x%2B2%7D%20%7D%20%3D%20%5Cfrac%7B1%7D%7B3%7D%20%20%20%2A%20%5Cfrac%7B3x%7D%7B%5Csqrt%7B4x%2B2%7D%7D%20%3D%20%5Cfrac%7Bx%7D%7B%5Csqrt%7B4x%2B2%7D%7D)