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Arithmetic Sequences
medium
0:00.0
If
x
,
x
+
3
,
2
x
+
1
x, x+3, 2x+1
x
,
x
+
3
,
2
x
+
1
are in arithmetic progression, find
x
x
x
.
A
4
4
4
B
5
5
5
C
6
6
6
D
7
7
7
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