1, - 12, 13, - 14, 15, - 16 According to certain rules, it is arranged as follows: first line 1, second line - 12 & nbsp; 13, third line - 14 & nbsp; 15-16, fourth line & nbsp; 17-18 & nbsp; & nbsp; 19-110 Please write the 10th number from left to right in line 20 () A. -1198B. -1200C. 1200D. 1202

1, - 12, 13, - 14, 15, - 16 According to certain rules, it is arranged as follows: first line 1, second line - 12 & nbsp; 13, third line - 14 & nbsp; 15-16, fourth line & nbsp; 17-18 & nbsp; & nbsp; 19-110 Please write the 10th number from left to right in line 20 () A. -1198B. -1200C. 1200D. 1202

The denominator is a continuous integer starting from 1, and the denominator at the end of line n is 1 + 2 + 3 + +N = n (n + 1) 2, the denominator of the last mantissa in line 19 is 19 × 202 = 190, then the denominator of the 10th number from left to right in line 20 is 190 + 10 = 200, then the score is - 1200