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Problem
Problem
For a particular arithmetic sequence,
u
10
=
14
u_{10}=14
u
10
=
14
and
S
25
=
200
S_{25}=200
S
25
=
200
. Find the value of
k
k
k
such that
u
k
=
0
u_k=0
u
k
=
0
.
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