[cfchenchen]

结果如下:>> chen001
请你确定t范围:
t=0:2;

y =

exp(3*t-t^2+21/2*exp(-2*t))*(Int(u*exp(-3*u+u^2-21/2*exp(-2*u)),u = 0 .. t)*exp(21/2)+10)/exp(21/2)


z =

t-1/2+21/2/exp(t)^2

>> chen001
请你确定t范围:
t=5:6;

y =

exp(-t-t^2+12*exp(t))*(Int(u*exp(u+u^2-12*exp(u)),u = 0 .. t)*exp(12)+10)/exp(12)


z =

-2*t-2+12*exp(t)
是新手,不知符合你的要求吗?