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Mathematics
Mathematics
Problem
If for an A.P.
a
1
,
a
2
,
a
3
,
…
,
a
n
,
…
a_1, a_2, a_3, \dots, a_n, \dots
a
1
,
a
2
,
a
3
,
…
,
a
n
,
…
a
1
+
a
3
+
a
5
=
−
12
and
a
1
a
2
a
3
=
8
a_1 + a_3 + a_5 = -12 \text{ and } a_1 a_2 a_3 = 8
a
1
+
a
3
+
a
5
=
−
12
and
a
1
a
2
a
3
=
8
then the value of
a
2
+
a
4
+
a
6
a_2 + a_4 + a_6
a
2
+
a
4
+
a
6
equals (A)
−
12
-12
−
12
(B)
−
16
-16
−
16
(C)
−
18
-18
−
18
(D)
−
21
-21
−
21
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