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Arithmetic Sequences
easy
0:00.0
Find
a
1
a_1
a
1
if
d
=
5
d = 5
d
=
5
and
a
11
=
60
a_{11} = 60
a
11
=
60
.
A
10
10
10
B
5
5
5
C
55
55
55
D
15
15
15
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