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利用公式:(uv)'=u 'v+uv 'y=e^x·(cosx+xsinx)y '=(e^x)'·(cosx+xsinx)+e^x·(cosx+xsinx)'=e^x·(cosx+xsinx)+e^x·[(cosx)'+(xsinx)']=e^x·(cosx+xsinx)+e^x·[-sinx+sinx+x·cosx]=e^x·(cosx+xsinx)+e^x…
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