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9
Section 2.2.2, Equal roots, reduction of order. Page 147
9.1
problem 1
9.2
problem 2
9.3
problem 3
9.4
problem 4
9.5
problem 6
9.6
problem 7
9.7
problem 10
9.8
problem 11
9.9
problem 12
9.10
problem 13
9.11
problem 14
9.12
problem 15
9.13
problem 16
9.14
problem 19
9.15
problem 20
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