Question

解答一道高数题目，数学高手求解，求函数的变换拉式函数。f(t)=3+t+2t^2 f(t )=e^-tcos5t

Answer 1

根据拉式变换公式可得 F(s)=3/s+1/s^2+4/s^3

F(s)=(s+1)/[(s+1)^2+5^2)]