harmonic progression Leave a Comment / Math / By Science++ A Harmonic Progression is defined as that in which reciprocal of its terms are in Arithmetic Progression.If a1 , a2 , a3 , ….are in H.P , then 1/a1 , 1 / a2 , 1 / a3 ,…. are in A.P. Note:1.Generalized formula is not available to find sum of n terms of H.P. 2. Any term can’t be zero in H.P