2.17 求下列函数的卷积积分 _(1)(t)*(f)_(2)(t) o-|||-(1) _(1)(t)=tg(t) ,_(2)(t)=e(t)-|||-(2) _(1)(t)=(e)^-2tg(t) ,_(2)(t)=g(t)-|||-(3) _(1)(t)=(f)_(2)(t)=(e)^-2tg(t)-|||-(4) _(1)(t)=(e)^-2tg(t) _(2)(t)=(e)^-3tg(t)-|||-(5) _(1)(t)=tg(t) ,_(2)(t)=(e)^-2te(t)-|||-(6) _(1)(t)=g(t+2) ,_(2)(t)=g(t-3)-|||-(7) _(1)(t)=g(t)-g(t-4) ,_(2)(t)=sin (pi t)g(t)-|||-(8) _(1)(t)=tg(t) ,_(2)(t)=g(t)-g(t-2)-|||-(9) _(1)(t)=tg(t-1) ,_(2)(t)=g(t+3)-|||-(10) _(1)(t)=(e)^-2tg(t+1) ,_(2)(t)=g(t-3)