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Mathematics
Mathematics
Problem
Let
S
n
S_n
S
n
denote the sum of the first
n
n
n
terms of an A.P. If
S
4
=
16
S_4 = 16
S
4
=
16
and
S
6
=
−
48
S_6 = -48
S
6
=
−
48
, then
S
10
S_{10}
S
10
is equal to (a)
−
260
-260
−
260
(b)
−
380
-380
−
380
(c)
−
320
-320
−
320
(d)
−
410
-410
−
410
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