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Mathematics
Mathematics
Problem
If the first, second and last term of an AP are
a
a
a
,
b
b
b
and
2
a
2a
2
a
respectively, its sum is (a)
a
b
2
(
b
−
a
)
\frac{ab}{2(b-a)}
2
(
b
−
a
)
ab
(b)
a
b
b
−
a
\frac{ab}{b-a}
b
−
a
ab
(c)
3
a
b
2
(
b
−
a
)
\frac{3ab}{2(b-a)}
2
(
b
−
a
)
3
ab
(d) none of these
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