DOI: 10.36347/sjet

Pages: 258-262

This paper discussed 1 2 1 2 arctan ( )  1    a dx n  x T x n  x this kind of definite integral. (T x n ( ) is n-th Qibixiaofu polynomial, n  0,1,2L ) The conclusion is when n is even number, a a n k   2 0 . And when n is odd number, 2 1 2 1 2 ( 1) ( 2 1) ( 0,1,2 )