L2#!#Sequence & Series#!#JEE Revison#!#A.P G.P H.P

Introduction OF Sequence and Series and A.P || Formation OF A.P and General term OF A.P

Introduction || Sequence || Series || Progression || Arithmatic Progression (A.P.) || A.P.terminologies || Consecutive terms OF A.P. || General apperence OF A.P. || Common difference OF A.P. Condition for a sequence to be A.P

If the square of differences of three numbers be in A.P., then their differences re in (A) A.P. (B) G.P. (C) H.P. (D) none of these

p : · If nth term of a sequence _is linear then sequence is in A.P. Converse of statement p is

If cos A+cos B+2cos C=2 then the sides of the A B C are in A.P. (b) G.P. (c) H.P. (d) none

If (l+mx)/(l-mx)= (m+nx)/(m-nx)=(n+px)/(n-px),x!=0 . Then the number l,m,n and p are in (A) A.P. (B) G.P. (C) H.P. (D) none of these

In an equilateral triangle, inradius r , circumradius R and ex-radius r_1 are in A.P. (b) G.P. (c) H.P. (d) none of these

In triangle ABC, if cosA+2cosB+cosC=2,t h e na ,b ,c are in (A) A.P. (B) G.P. (C) H.P. (D) none of these

If |a|,|b|,|c| lt 1 and a,b,c are in A.P, let S_x=1+x+x^2+...oo then S_a, S_b, S_c are in (A) A.P (B) G.P (C)H.P (D) None