Solve the initial value problem y'' = e^x/2 y'(0) = 3 y(0) = 5

Solve the initial value problem
y=ex/2y(0)=3y(0)=5\begin{aligned} y''& = e^{x/2}\\ y'(0)& = 3\\ y(0) &= 5 \end{aligned}

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