两道数学题 不过题目是英文的 求大神帮忙解答 帮忙给出详细步骤
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1.
(a) I(t)=I(0)*exp(-t*R/L).
(b) I=10*exp(-0.02*2/0.06)=5.13A.
(c) I cannot help you on this topic. But make sure you draw Tau and 3Tau I guess? Tau is 0.03s. I used to be a TA at 100 level course for Electrical Engineering. I think you need t=Tau and 3Tau.
2. dy/y=xdx/(1+x^2), so log(y)=0.5*log(1+x^2)+C0, so y=C*sqrt(1+x^2). Sqrt is the square root function. since a specific point is (x,y)=(0,1), we can get C=1 and the final answer is
y=sqrt(1+x^2).
(a) I(t)=I(0)*exp(-t*R/L).
(b) I=10*exp(-0.02*2/0.06)=5.13A.
(c) I cannot help you on this topic. But make sure you draw Tau and 3Tau I guess? Tau is 0.03s. I used to be a TA at 100 level course for Electrical Engineering. I think you need t=Tau and 3Tau.
2. dy/y=xdx/(1+x^2), so log(y)=0.5*log(1+x^2)+C0, so y=C*sqrt(1+x^2). Sqrt is the square root function. since a specific point is (x,y)=(0,1), we can get C=1 and the final answer is
y=sqrt(1+x^2).
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看不大懂 能不能写详细点
追答
都是解微分方程，第一道是比较简单的经典的微分方程问题，第二道需要一些计算，比如分离x和y到两端分别积分。
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