0 votes 0 votes If $a$ and $b$ are arbitrary constants, then the solutions to the ordinary differential equation $\dfrac{d^{2}y}{dx^2} – 4y = 0$ is $y = ax + b$ $y = ae^{-x}$ $y = a\sin2x + b\cos2x$ $y = a\cosh2x + b\sinh2x$ Differential equations gate2012 differential-equations + – Milicevic3306 asked Mar 25, 2018 • edited Mar 15, 2021 by soujanyareddy13 Milicevic3306 7.9k points answer See all 0 reply