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Mathematics
Mathematics
Problem
11. If
α
\alpha
α
and
β
\beta
β
are different complex numbers with
∣
β
∣
=
1
|\beta|=1
∣
β
∣
=
1
, then find
∣
β
−
α
1
−
α
ˉ
β
∣
\left|\frac{\beta-\alpha}{1-\bar{\alpha} \beta}\right|
1
−
α
ˉ
β
β
−
α
.
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