数学帮忙求几个式子的导数1,a属于R,求f(x)=x^2乘以e^(ax)的导数2,对y=(x^3-2)/{2(x-1)}求导3,对f(x)=(x-a)^2(x+b)e^x求导4,数列an=cos(n派+派/2),数列an=sin(n派)/2,数列an=(n^2)/(n^2+1)三个数列是否存在极限5,证
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![数学帮忙求几个式子的导数1,a属于R,求f(x)=x^2乘以e^(ax)的导数2,对y=(x^3-2)/{2(x-1)}求导3,对f(x)=(x-a)^2(x+b)e^x求导4,数列an=cos(n派+派/2),数列an=sin(n派)/2,数列an=(n^2)/(n^2+1)三个数列是否存在极限5,证](/uploads/image/z/8786749-13-9.jpg?t=%E6%95%B0%E5%AD%A6%E5%B8%AE%E5%BF%99%E6%B1%82%E5%87%A0%E4%B8%AA%E5%BC%8F%E5%AD%90%E7%9A%84%E5%AF%BC%E6%95%B01%2Ca%E5%B1%9E%E4%BA%8ER%2C%E6%B1%82f%28x%29%3Dx%5E2%E4%B9%98%E4%BB%A5e%5E%28ax%29%E7%9A%84%E5%AF%BC%E6%95%B02%2C%E5%AF%B9y%3D%28x%5E3-2%29%2F%7B2%28x-1%29%7D%E6%B1%82%E5%AF%BC3%2C%E5%AF%B9f%28x%29%3D%EF%BC%88x-a%29%5E2%28x%2Bb%EF%BC%89e%5Ex%E6%B1%82%E5%AF%BC4%2C%E6%95%B0%E5%88%97an%3Dcos%28n%E6%B4%BE%2B%E6%B4%BE%2F2%29%2C%E6%95%B0%E5%88%97an%3Dsin%28n%E6%B4%BE%29%2F2%2C%E6%95%B0%E5%88%97an%3D%28n%5E2%29%2F%28n%5E2%2B1%29%E4%B8%89%E4%B8%AA%E6%95%B0%E5%88%97%E6%98%AF%E5%90%A6%E5%AD%98%E5%9C%A8%E6%9E%81%E9%99%905%2C%E8%AF%81)
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