6 11/05

1. New: 1.1.18 Old: 1.1.22 Derive the qualitative properties (symmetries, asymptotes, maxima, minima, ranges, cusps, inflection points) of the curve from the direction field. Do not solve the ODE; graphics only. No cheating!

2. New: 1.2.14 Old: 1.2.14 Also solve it when $y(1)=0$. Neatly sketch both solutions in the $x,y$-plane.

3. New: 1.3.4 Old: 1.3.4. Use the class procedure, variation of parameter.

4. New: 2.4.2 Old: 2.4.2

5. New: 2.6.4 Old: 2.6.4. Must use variation of parameters.

6. New: 2.6.16 Old: 2.6.16. Must use undetermined coefficients.

7. New: 2.6.32 Old: 2.6.50. Must use undetermined cooefficients.