1 |
|
|
2 |
|
4
3
1
0
|
3 |
The some of cube roots of unity is: |
Zero
One
Two
Three
|
4 |
|
1
|
5 |
|
2
1
0
|
6 |
|
2
1
|
7 |
The product of three cube roots of unity is: |
Zero
Four
Two
One
|
8 |
|
|
9 |
Each of the complex cube root of unity is: |
The square of the other
The half of the other
The cube of the other
Equal to each other
|
10 |
The two complex cube roots of unity are (img) and: |
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11 |
The value of i is equal to: |
|
12 |
If (x+1)(7x+1) = 0 then x is equal to: |
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13 |
If a = 7, b = 8 and c = 1 then b2-4ac is equal to: |
33
34
35
36
|
14 |
Find k, if the roots are equal in (k+3)x2-2(k+1)x-(k+1)=0: |
2, -1
-2,-1
-2,1
2,1
|
15 |
The discriminant of 7x2+8x+1=0 is: |
32
34
36
38
|