HomeMATHArithmetic progression prove that Question Arithmetic progression prove that Question Er Chandra Bhushan October 24, 2020 0 Prove that d=Sn-2Sn-1-Sn-2Soln:-d=Sn-2Sn-1-Sn-2We know that, d=an-an-1d=Sn-Sn-1-Sn-1-Sn-2d=Sn-2Sn-1-Sn-2 Proved Tags MATH Newer Older