Question: 1. Consider strings that contain only the characters A, B, C, D and E. Find a recurrence relation for the number of such strings

1. Consider strings that contain only the characters A, B, C, D

1. Consider strings that contain only the characters A, B, C, D and E. Find a recurrence relation for the number of such strings that contain three consecutive Bs. What are the initial conditions? 2. Solve the recurrence relation an = -2 and a = 0. ao = 4an-1-4an-2 4an-2 + 2n4" with initial conditions

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