0, 1, 1, 3, 5, 11,  .. A string of numbers starting with the numbers 0 and 1 is given above. For k> = 3, the relationship of the terms in the series with the previous two terms can be expressed as 

a) consisting of the first two terms of the sequence  ,  which consists of the second and third terms. Find the matrix A that converts to the vector. (1 = 0) b) Using the eigenvalue vectors of matrix A, calculate the 20th term of the array.

arrak 1+2*ak-2 H = on II In