Example 3.1.1

Check solution to the differential equation:

sol=DSolve[{y''[t]+2y'[t]-3y[t]==0},y[t],t]

Example 3.1.5

Check solution to the differential equation:

sol=DSolve[{y''[t]+5y'[t]==0},y[t],t]

Example 3.1.7

Check solution to the differential equation:

sol=DSolve[{y''[t]-9y'[t]+9y[t]==0},y[t],t]