Ngày tải lên :
06/08/2014, 01:21
... more that s values For instance, (12 ) 11 /2 = 1 and 11 /2 = ( 1) 2 = Example 6.6.2 Consider 21/ 5 , (1 + ı )1/ 3 and (2 + ı)5/6 √ 21/ 5 = eı2πk/5 , for k = 0, 1, 2, 3, 19 9 = √ (1 + ı )1/ 3 = = (2 + ı)5/6 ... arctan(3, 1) ) − ı sin(9 arctan(3, 1) )) 10 000 10 (x − y) √ (cos(9 arctan(3, 1) ) + sin(9 arctan(3, 1) )) = 10 000 10 (x − y) √ (cos(9 arctan(3, 1) ) − sin(9 arctan(3, 1) )) +ı 10 000 10 = (1 + ı)(x − y) 212 ... = √ = 12 √ 1/ 3 eıπ/4 eıπ /12 eı2πk/3 , eı Arctan(2 ,1) for k = 0, 1, 5/6 55 eı5 Arctan(2 ,1) 1/ 6 55 eı Arctan(2 ,1) eıπk/3 , for k = 0, 1, 2, 3, 4, Example 6.6.3 We find the roots of z + (−4 )1/ 5 =...