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Geometric Sequences
hard
0:00.0
Find
r
r
r
if
a
k
=
x
a_k=x
a
k
=
x
and
a
k
+
1
=
y
a_{k+1}=y
a
k
+
1
=
y
.
A
y
/
x
y/x
y
/
x
B
x
/
y
x/y
x
/
y
C
y
−
x
y-x
y
−
x
D
None
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