高数上册习题5-4定积分第1题(5)

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=(t->∞) limit [(-p exp(-pt) sin(wt)-w exp(-pt) cos(wt))/(p²孝丛+w²)] - [-p exp(-p*0) sin(w*0)-w exp(-p*0) cos(w*0))/册慎纯(p²+w²)]
=0+[p exp(0) sin(0)+w exp(0) cos(0))/(p²+w²)
=w/(p²州咐+w²)

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