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Arithmetic Sequences
medium
0:00.0
Find
d
d
d
if
a
1
=
100
,
a
2
=
99.5
a_1=100, a_2=99.5
a
1
=
100
,
a
2
=
99.5
.
A
−
0.5
-0.5
−
0.5
B
0.5
0.5
0.5
C
−
1
-1
−
1
D
1
1
1
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