1.已知y1=3,y2=3+x²,y3=3+x²+e^x都是微分方程y"+p(x)y'+q(x)y=
2个回答
1.y=C1 e^x+C2 2x^+C3
2.(-2,0,3) 3
3.1/(3倍根号下2)
4.
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