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Thomas Calculus 13th [Solutions]

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666 Chapter 9 First-Order Differential Equations<br />

25. 26.<br />

27. 28.<br />

29. The general solution is<br />

slope field.<br />

y<br />

y<br />

1<br />

2<br />

ce<br />

2t<br />

. The particular solution<br />

y<br />

2<br />

1 3e<br />

2t<br />

is shown below together with the<br />

3<br />

2<br />

1<br />

0 1 2 3 4<br />

x<br />

30. The general solution is<br />

y<br />

tan<br />

1<br />

c cos x<br />

2e<br />

2( c cos x)<br />

1 e<br />

. The required particular solution with<br />

c 1 ln(csc 2 cot 2) 1.443 is shown below together with the slope field.<br />

y<br />

5<br />

5 0 5<br />

x<br />

5<br />

Copyright<br />

2014 Pearson Education, Inc.

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