Let a,b,c,d be the foru cosecutive coefficients int eh binomial expansion `(1+x)^n` On the basis of above information answer the following question: `a/(a+b), b/(b+c), c/(c+d)` are in (A) A.P. (B) G.P. (C) H.P. (D) none of these

Let a,b,c,d be the foru cosecutive coefficients int eh binomial expansion (1+x)^n On the basis of above information answer the following question: ((bc+ad)(b-c))/(ac^2-b^2d)= (A) 1/2 (B) 1 (C) -1 (D) 2

Let a,b,c,d be the foru cosecutive coefficients int eh binomial expansion (1+x)^n On the basis of above information answer the following question: The value of n is (A) (2ac-b(a+c))/(b^2-ac) (B) (2ac+b(a+c))/(b^2-ac) (C) (2ac)/(a+c)-b (D) (b^2-ac)/(2ac+b(a+c)

log_4 5, log_20 5, log_100 5 are in (A) A.P.(C) H.P.(B) G.P.(D) none of these

If a,b,c are in A.P ,then 3^(a),3^(b),3^(c) shall be in (A) 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,d are distinct positive then a^n/b^ngtc^n/d^n for all epsilon N if a,b,c,d are in (A) A.P. (B) G.P. (C) H.P. (D) none of these

If (b+c)/(a+d)= (bc)/(ad)=3 ((b-c)/(a-d)) then a,b,c,d are in (A) H.P. (B) G.P. (C) A.P. (D) none of these

If a_n= int_0^pi(sin(2n-1)x)/sinx dx, then a_1a_2a_3 are in (A) A.P. (B) G.P. (C) H.P. (D) none of these

If a,b,c,d,e are in H.P., then a/(b+c+d+e), b/(a+c+d+e),c/(a+b+d+e), d/(a+b+c+e), e/(a+b+c+d) are in (A) A.P. (B) G.P. (C) H.P. (D) none of these