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Arithmetic Sequences
easy
0:00.0
Find
d
d
d
if
a
1
=
1
a_1=1
a
1
=
1
and
a
10
=
10
a_{10}=10
a
10
=
10
.
A
1
1
1
B
9
/
9
=
1
9/9=1
9/9
=
1
C
0
0
0
D
1.1
1.1
1.1
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