清大暑期進修班Maple 6 作業 
 
 
2-1 Show that trace of AB = trace of BA 
2-2 Show that (AB - BA)(AB - BA) is scalar 
2-3 Find all matrices commuting with . 
2-4 Show that A-1BA can never be diagonal. 
2-5 Show that there is no real invertible matrix S with S-1
                                          S triangular. 
2-6 Use the spreadsheet in Maple to experiment with the 3x + 1
              problem. 
2-7 How is the number pattern related to the sucessive derivatives of
              tan(x) formed? 
2-8 How is the number pattern related to the sucessive derivatives of
              cot(x) formed? 
2-9 Express tan(nx) as a rational function of tan(x) for n =
              1,2,3,4,5,6. 
2-10 Study the number pattern associated with the indefinite integral of
              the function xnex. 
2-11 List the Chebyshev polynomials Tn(x) for n = 0,1,2,3,4,5,6. 
2-12 Find an exponent n such that some coefficients appearing in the
              factorization of xn - 1 are different from 0, -1 and 1. 
2-13 Factor (((x2 - a)2 - a)2 - a)2 - a - x.