In a `/_\ABC, tan, A/2 = 5/6 and tan, C/2 = 2/5 then (A) a,c,b are in A.P. (B) a,b,c are in A.P. (C) b,a,c are in A.P. (D) a,b,c are in G.P.

If a,b,c, are in A.P., b,c,d are in G.P. and c,d,e, are in H.P., then a,c,e are in

If bx+cy=a , there a, b, c are of the same sign, be a line such that the area enclosed by the line and the axes of reference is 1/8 square units, then : (A) b,a,c are in G.P. (B) b, 2a, c arein G.P. (C) b, a/2, c are in A.P. (D) b, -2a, c are in G.P.

If l n(a+c),l n(a-c) and l n(a-2b+c) are in A.P., then (a) a ,b ,c are in A.P. (b) a^2,b^2, c^2, are in A.P. (c) a ,b ,c are in G.P. (d) a ,b ,c are in H.P.

If a,b,c are in A.P. as well as in G.P. then

Roots of the equation a(b-c)x^2+b(c-a)x+c(a-b)=0 are real and equal, then (A) a+b+c!=0 (B) a,b,c are in H.P. (C) a,b,c are in A.P. (D) a,b,c are in G.P.

If a, b, c are in A.P. and b-a, c-b, a are in G.P. then a:b:c=?

If a, b, c are in A.P and a, b, d are in G.P, prove that a, a -b, d -c are in G.P.

If a, b, c are in A.P and a, b, d are in G.P, prove that a, a -b, d -c are in G.P.

If a, b, c are in A.P and a, b, d are in G.P, prove that a, a -b, d -c are in G.P.

If in Delta ABC, tan.(A)/(2) = (5)/(6) and tan.( C)/(2)= (2)/(5) , then prove that a, b, and c are in A.P.