Question

2
21. If the nonzero numbers an, az, az, ... ,an, ... are in Al
prove that
11
атауаз ауаҙа, ар – 2 ап – 1 ап
1
—
+
—
+ ...
+ -
1 - 1
1 —.
2(a, - a) a1a2
an – 1ап​

Answer 1

Answer:

oso hard questions which class is this question belongs to