Example 4: Solve the differential equation from Example 3, that satisfies the initial conditions .

> y:=unapply(%,x);

Recall, unapply makes the previous expression % , a function of .

> solve({y(0)=1,D(y)(0)=3},{c[1],c[2]});

Note how we used the operator D(y) instead of diff(y(x),x) .