Saved Bookmarks
| 1. |
if `omega` is a complex fifth roots of unity and `(1+omega+omega^(2)+omega^(3))^(2005)=A+Bomega+Comega^(2)+Domega^(3)` (Where A,B,C,D are real), the `A^(2)+B^(3)+C^(4)+D^(5)=`A. 2B. 1C. 3D. None of these |
|
Answer» Correct Answer - B `because omega` is a complex fifth roots of unity. `therefore1+omega+omega^(2)+omega^(3)+omega^(4)=0` `implies(-omega^(4))^(2005)=A+Bomega+Comega^(2)+Domega^(3)` `implies-omega^(8020)=A+Bomega+Comega^(2)+Domega^(3)` `implies-(omega^(5))^(1604)=A+Bomega+Comega^(2)+Domega^(3)` `implies-1=A+Bomega+Comega^(2)+Domega^(3)` `impliesA=-1,B=0,C=0,D=0` |
|