I=∫cos2x/(x²+2x+2)dx积分上下限分别为正无穷和负无穷.求这个积分.还有一道题求∫(x²+2ixy)dz积分路径是c c为从0沿虚轴到i,再由i沿水平方向至1+i的折线
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![I=∫cos2x/(x²+2x+2)dx积分上下限分别为正无穷和负无穷.求这个积分.还有一道题求∫(x²+2ixy)dz积分路径是c c为从0沿虚轴到i,再由i沿水平方向至1+i的折线](/uploads/image/z/5937496-16-6.jpg?t=I%3D%E2%88%ABcos2x%2F%28x%26%23178%3B%2B2x%2B2%29dx%E7%A7%AF%E5%88%86%E4%B8%8A%E4%B8%8B%E9%99%90%E5%88%86%E5%88%AB%E4%B8%BA%E6%AD%A3%E6%97%A0%E7%A9%B7%E5%92%8C%E8%B4%9F%E6%97%A0%E7%A9%B7.%E6%B1%82%E8%BF%99%E4%B8%AA%E7%A7%AF%E5%88%86.%E8%BF%98%E6%9C%89%E4%B8%80%E9%81%93%E9%A2%98%E6%B1%82%E2%88%AB%EF%BC%88x%26%23178%3B%2B2ixy%EF%BC%89dz%E7%A7%AF%E5%88%86%E8%B7%AF%E5%BE%84%E6%98%AFc+c%E4%B8%BA%E4%BB%8E0%E6%B2%BF%E8%99%9A%E8%BD%B4%E5%88%B0i%2C%E5%86%8D%E7%94%B1i%E6%B2%BF%E6%B0%B4%E5%B9%B3%E6%96%B9%E5%90%91%E8%87%B31%2Bi%E7%9A%84%E6%8A%98%E7%BA%BF)
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