Let `a_1, a_(2), a_(3),...` ,be the terms of an `A.P` .If `(a_(1)+a_(2)+....+a_(p))/(a_(1)+a_(2)+....+a_(q))=(p^(2))/(q^(2))` where `p!=q` then `(a_(6))/(a_(21))=`

If a_(1),a_(2),a_(3),... be terms of an A.P.if (a_(1)+a_(2)+...+a_(p))/(a_(1)+a_(2)+...+a_(q))=(p^(2))/(q^(2)),p!=q, then (a_(6))/(a_(21)) equals 41/11 b.7/2quad c.2/7 d.11/41

Let a_(1),a_(2),a_(3),...... be an A.P.such that (a_(1)+a_(2)+......+a_(p))/(a_(1)+a_(2)+a_(3)+......+a_(q))=(p^(3))/(q^(3));p!=q Then (a_(6))/(a_(21)) is equal to:

let a_(1),a_(2),a_(3),........., be an AP such that (a_(1)+a_(2)+a_(3)+.........+a_(p))/(a_(1)+a_(2)+a_(3)+.........+a_(q))=(p^(3))/(q^(3))(p!=q) then find (a_(6))/(a_(21))=?

Let a_(1), a_(2), a_(3) , …..be in A.P. If (a_(1) + a_(2) + …. + a_(10))/(a_(1) + a_(2) + …. + a_(p)) = (100)/(p^(2)), p ne 10 , then (a_(11))/(a_(10)) is equal to :

let a_(1),a_(2),a_(3)...... be an AP such that (a_(1)+a_(2)+............+a_(p))/(a_(1)+a_(2)+............+a_(q))=(p^(3))/(q^(3)) then a_(/)a_(21)

Let a_(1),a_(2),a_(3)... be in A.P.and a_(p),a_(q),a_(r) be in G.P.then value of (a_(q))/(a_(p)) is

Let a_(1),a_(2),a_(3),...a_(n) be an AP.Prove that: (1)/(a_(1)a_(n))+(1)/(a_(2)a_(n-1))+(1)/(a_(3)a_(n-2))+......+(1)/(a_(n)a_(1))=

a_(1),a_(2),a_(3),......,a_(n), are in A.P such that a_(1)+a_(3)+a_(5)=-12 and a_(1)a_(2)a_(3)=8 then