6 Kamke chapter 4. Linear fourth order

6.1   ODE No. 1534
6.2   ODE No. 1535
6.3   ODE No. 1536
6.4   ODE No. 1537
6.5   ODE No. 1538
6.6   ODE No. 1539
6.7   ODE No. 1540
6.8   ODE No. 1541
6.9   ODE No. 1542
6.10   ODE No. 1543
6.11   ODE No. 1544
6.12   ODE No. 1545
6.13   ODE No. 1546
6.14   ODE No. 1547
6.15   ODE No. 1548
6.16   ODE No. 1549
6.17   ODE No. 1550
6.18   ODE No. 1551
6.19   ODE No. 1552
6.20   ODE No. 1553
6.21   ODE No. 1554
6.22   ODE No. 1555
6.23   ODE No. 1556
6.24   ODE No. 1557
6.25   ODE No. 1558
6.26   ODE No. 1559
6.27   ODE No. 1560
6.28   ODE No. 1561
6.29   ODE No. 1562
6.30   ODE No. 1563
6.31   ODE No. 1564
6.32   ODE No. 1565
6.33   ODE No. 1566
6.34   ODE No. 1567
6.35   ODE No. 1568
6.36   ODE No. 1569
6.37   ODE No. 1570
6.38   ODE No. 1571
6.39   ODE No. 1572
6.40   ODE No. 1573