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Mathematics
Problem
If the roots of the equation
a
x
−
a
+
b
x
−
b
=
1
\frac{a}{x-a} + \frac{b}{x-b} = 1
x
−
a
a
+
x
−
b
b
=
1
are equal in magnitude and opposite in sign, then prove that
a
+
b
=
0
a + b = 0
a
+
b
=
0
.
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