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Mathematics
Problem
The number of real solutions of the equation
e
4
x
+
4
e
3
x
−
58
e
2
x
+
4
e
x
+
1
=
0
e^{4x} + 4e^{3x} - 58e^{2x} + 4e^x + 1 = 0
e
4
x
+
4
e
3
x
−
58
e
2
x
+
4
e
x
+
1
=
0
is \_\_\_\_.
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