The difference between two roots of the equation x3 - 13x2 + 15x + 189 = 0 is 2. Then the roots of the equation are :
- 3, 5, 7
- 3, - 7, - 9
3, - 5, 7
- 3, - 7, 9
The product of the distinct (2n)th roots of 1 + i is equal to :
0
B.
Product of the distinct (2n)th roots of