QUESTION $8$

The solution of $(D^2-D-2)y=0$ is $y=c_1{e}^{-2x}+c_2{e}^x$

True

False

QUESTION $9$

$y=c_1{e}^{5x}+c_{2}x{e}^{5x}+\frac{6}{5}x+\frac{3}{5}$ is the solution of $y^{\text{'}\text{'}}-10y^{\text{'}}+25y=30x+3$

True

False

QUESTION $10$

The solution of $y^{\text{'}\text{'}}+4y=3sin2x$ is $y=c_{1}cos2x+c_{2}sin2x-\frac{3}{4}cos2x$

True

False