sn=1*x+3*x^2+5*x^3……+(2n-1)*x^n.求和
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sn=1*x+3*x^2+5*x^3……+(2n-1)*x^n.求和
![sn=1*x+3*x^2+5*x^3……+(2n-1)*x^n.求和](/uploads/image/z/19349623-55-3.jpg?t=sn%3D1%2Ax%2B3%2Ax%5E2%2B5%2Ax%5E3%E2%80%A6%E2%80%A6%2B%282n-1%29%2Ax%5En.%E6%B1%82%E5%92%8C)
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求和:Sn=1+3x+5x+7x+...+(2n-1)x^(n-1)谢谢了,
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