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Mathematics
Problem
The number of real solutions of
x
7
+
5
x
3
+
3
x
+
1
=
0
x^7 + 5x^3 + 3x + 1 = 0
x
7
+
5
x
3
+
3
x
+
1
=
0
is equal to. [Main June 28, 2022 (I)] (a) 0 (b) 1 (c) 3 (d) 5
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