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Mathematics
Mathematics
Problem
If
a
n
=
−
2
4
n
2
−
16
n
+
15
a_n = \frac{-2}{4n^2 - 16n + 15}
a
n
=
4
n
2
−
16
n
+
15
−
2
, then
a
1
+
a
2
+
⋯
+
a
25
a_1 + a_2 + \dots + a_{25}
a
1
+
a
2
+
⋯
+
a
25
is equal to (a)
52
/
147
52/147
52/147
(b)
50
/
141
50/141
50/141
(c)
51
/
144
51/144
51/144
(d)
49
/
138
49/138
49/138
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