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Equations & Systems
medium
0:00.0
If
x
+
1
x
=
3
x + \frac{1}{x} = 3
x
+
x
1
=
3
, what is
x
2
+
1
x
2
x^2 + \frac{1}{x^2}
x
2
+
x
2
1
?
A
7
7
7
B
9
9
9
C
11
11
11
D
5
5
5
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