5楼: Originally posted by dingd at 2011-11-06 21:43:51
有点类似隐式微分方程了，用1stOpt应该可以求解，假设x初值为0.1，t范围=【0,2*pi】：

Variable t=, x=0.1;
Plot x;
ODEFunction x' = (0.1*sin(2*t)-x)*(1+(x')^2);


t        x(t)
0        0.1
0.20943951        0.085071 ...