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Mathematics
Problem
The sum of the first p, q, r terms of an A.P. are a, b, c respectively. Show that
a
p
(
q
−
r
)
+
b
q
(
r
−
p
)
+
c
r
(
p
−
q
)
=
0
\frac{a}{p}(q-r) + \frac{b}{q}(r-p) + \frac{c}{r}(p-q) = 0
p
a
(
q
−
r
)
+
q
b
(
r
−
p
)
+
r
c
(
p
−
q
)
=
0
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