if y=e^(-kt)[Acosh(qt)+Bsinh(qt)] where A,B,q and

if y=e^(-kt)[Acosh(qt)+Bsinh(qt)]where A,B,q and k are constant show that d^2y/dt^2+2kdy/dt+(k^2-q^2)y=0 step plz thanks
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2. asked by samuel
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