If in a progression `a_1, a_2, a_3, e t cdot,(a_r-a_(r+1))`bears a con – InterviewSolution

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1.	If in a progression `a_1, a_2, a_3, e t cdot,(a_r-a_(r+1))`bears a constant atio with `a_rxxa_(r+1)`, then the terms of the progression are ina. A.P b. G.P. c. H.P. d. none of theseA. A.PB. G.PC. H.PD. none of these
Answer» Correct Answer - C `(a_(r)-a_(r+1))/(a_(r)a_(r+1))=k` (constant) `rArr1/(a_(r+1))-1/a_(r)=k` `1/a_(1),1/a_(2),….,1/a_(n)` are in A.P. `rArra_(1),a_(2),a_(3),…` are in H.P.

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