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Arithmetic Sequences
medium
0:00.0
What is
a
1
a_1
a
1
for
x
,
x
+
2
,
x
+
4
x, x+2, x+4
x
,
x
+
2
,
x
+
4
?
A
x
x
x
B
x
+
2
x+2
x
+
2
C
2
2
2
D
0
0
0
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