Choose the correct options for the following questions.
Real fourth roots of unity are
Verified
Difficulty: Easy
A:
$0, 1$
B:
$1, -1$
C:
$1, -1, i, -i$
D:
$0, 1, i$
Sum of the reciprocals of fourth roots of unity is?
Verified
Difficulty: Easy
A:
$0$
B:
$1$
C:
$i$
D:
$2$
If $x=3y$ and $3x-2y=7$, which of the following is the value of $y$ that satisfies both equations?
Verified
Difficulty: Easy
A:
$1$
B:
$1.5$
C:
$2.5$
D:
$3$
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