What is the integrating factor for the differential equation ty′+2y=t2t y' + 2y = t^2ty′+2y=t2?
μ(t)=t\mu(t) = tμ(t)=t
μ(t)=t2\mu(t) = t^2μ(t)=t2
μ(t)=2t\mu(t) = 2tμ(t)=2t
μ(t)=e2t\mu(t) = e^{2t}μ(t)=e2t