[問題] 積分的題目已回收
syms t a s
EDU?E=t*exp(a*t)*exp(-s*t)
E =
t*exp(a*t)*exp(-s*t)
EDU?int(E,t,0,inf)
Definite integration: Can't determine if the integral is convergent.
Need to know the sign of --> -a+s
Will now try indefinite integration and then take limits.
ans =
limit(((a-s)*t*exp(t*(a-s))-exp(t*(a-s)))/(a-s)^2+1/(a-s)^2,t = inf)
可是助教解完答案是
1/(s-a)
問題好像出在
Definite integration: Can't determine if the integral is convergent.
Need to know the sign of --> -a+s
Will now try indefinite integration and then take limits.
這段話?
好像說要找出他的收斂??
拜託各位高手跟我解答問題出在哪吧
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