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OpenStudy (priyar):
If a1,a2,.....,an are in H.P then a1a2+a2a3+..+a n-1 a n =?
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OpenStudy (priyar):
@ParthKohli
Parth (parthkohli):
well, remember telescopic sums?
OpenStudy (priyar):
(a1-an )/d then ?
Parth (parthkohli):
\[a_n = a_1 + (n-1)d\]Just solve for \(d\) in the above.
OpenStudy (priyar):
so it is 1-n ?
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OpenStudy (priyar):
no... its not that d ...
OpenStudy (priyar):
hey this is in H.P!
OpenStudy (priyar):
anyway i got the idea.....
Parth (parthkohli):
yeah, true.
OpenStudy (priyar):
Thanks
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Parth (parthkohli):
no problem :)
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