The differential equation

$y^{\text{'}\text{'}}=0$

has one of the following two parameter families as its general solution:

$y=C_1{e}^x+C_2{e}^{-x}$

$y=C_{1}cos(x)+C_{2}sin(x)$

$y=C_{1}tan(x)+C_{2}sec(x)$

$y=C_1+C_{2}x$

Find the solution such that $y(0)=1$ and $y^{\text{'}}(0)=9.$

$y(x)=$

help $($formulas$)$