If `a , b ,a n dc` are in G.P., then `a+b ,2b ,a n db+c` are in a. A.P b. G.P. c. H.P. d. none of these

If a^2+b^2,a b+b c ,a n db^2+c^2 are in G.P., then a ,b ,c are in a. A.P. b. G.P. c. H.P. d. none of these

If a ,b ,c are in A.P., the a/(b c),1/c ,1/b will be in a. A.P b. G.P. c. H.P. d. none of these

If a,b, and c are in G.P then a+b,2b and b+ c are in

If a , b, c, … are in G.P. then 2a,2b,2c,… are in ….

If sin(y+z-x),sin(z+x-y),"sin"(x+y-z) are in A.P., then t a n x ,tany ,tanz are in (a)A.P. (b) G.P. (c) H.P. (d) none of these

If a x^3+b x^2+c x+d is divisible by a x^2+c ,t h e na ,b ,c ,d are in a. A.P. b. G.P. c. H.P. d. none of these

a ,b ,c x in R^+ such that a ,b ,a n dc are in A.P. and b ,ca n dd are in H.P., then a b=c d b. a c=b d c. b c=a d d. none of these

If a, b, c, d are in G.P., then (a + b + c + d)^(2) is equal to

If x ,y ,a n dz are distinct prime numbers, then x , y , a n dz may be in A.P. but not in G.P. x , y , a n dz may be in G.P. but not in A.P. x , y , a n dz can neither be in A.P. nor in G.P. none of these

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 in a. A.P b. G.P. c. H.P. d. none of these