Author Topic: test 4 main D  (Read 232 times)

yantian4

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test 4 main D
« on: December 07, 2020, 03:50:58 AM »
1 b)   x(t)=[-arctan(e^3t)+c1][2 1]e^-3t+[In(e^6t+1)+c2]+[1 2]e^-6t