If `a ,b ,a n dc` are in A.P., then `a^3+c^3-8b^3` is equal to `2a b c` b. `6a b c` c. `4a b c` d. none of these

If a,b,c are in A.P., then a^(3)+c^(3)-8b^(3) is equal to

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

If A , B , C are in A.P. then (sin A-sin C)/(cos C-cos A)= adot t a n B b. cot B c. t a n2B d. none of these

If a,b,c are in A.P.,prove that 8b^(3)-a^(3)-c^(3)=3ac(a+c)

If a,b,c,d, e are in A.P.,the find the value of a-4b+6c-4d+e

If a, b, c are in A.P., then show that (i) b + c – a, c + a – b, a + b – c are in A.P.

If a, b, c are in A.P., prove that a^(3)+4b^(3)+c^(3)=3b(a^(2)+c^(2)).

A\ (6,3),\ B(-3,5),\ C(4,-2)\ a n d\ D(x ,3x) are four points. If "Delta"D B C :"Delta"A B C=1:2, then x is equal to a. 11/8 b. 8/11 c. 3 d. none of these

If a,b,c,d are positive numbers such that a,b,c are in A.P. and b,c,d are in H.P., then : (A) ab=cd (B) ac=bd (C) ad=bc (D)none of these