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Mathematics 18 Online
OpenStudy (priyar):

If a1,a2,.....,an are in H.P then a1a2+a2a3+..+a n-1 a n =?

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 ?

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

Parth (parthkohli):

no problem :)

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