For the Bernoulli equation y′+2y=y3exy' + 2y = y^3 e^xy′+2y=y3ex, what is the linearized equation using v=y−2v = y^{-2}v=y−2?
v′−4v=−2exv' - 4v = -2e^xv′−4v=−2ex
v′+4v=−2exv' + 4v = -2e^xv′+4v=−2ex
v′−2v=−2exv' - 2v = -2e^xv′−2v=−2ex
v′+2v=−2exv' + 2v = -2e^xv′+2v=−2ex