For an increasing geometric sequence `a_(1),a_(2),a_(3),...,a_(n)` if `a_(6)=4a_(4)`&`a_(0)-a_(7)-192` and `sum_(1=4)^(n)a_(i)=1016` ,then n is

for an increasing GP,a_(1),a_(2),.......a_(n) if a_(6)=4a_(4),a_(9)-a_(7)=192, then the value of sum(1)/(a_(i))

For an increasing G.P. a_(1), a_(2), a_(3),.....a_(n), " If " a_(6) = 4a_(4), a_(9) - a_(7) = 192 , then the value of sum_(l=1)^(oo) (1)/(a_(i)) is

A geometric sequence has four positive terms a_(1),a_(2),a_(3),a_(4). If (a_(3))/(a_(1))=9 and a_(1)+a_(2)=(4)/(3) then a_(4) equals

If a_(1),a_(2),a_(3),.....a_(n) are in H.P.and a_(1)a_(2)+a_(2)a_(3)+a_(3)a_(4)+......a_(n-1)a_(n)=ka_(1)a_(n) then k is equal to

In an arithmetic sequence a_(1),a_(2),a_(3), . . . . .,a_(n) , Delta=|{:(a_(m),a_(n),a_(p)),(m,n,p),(1,1,1):}| equals

The sequence a_(1),a_(2),a_(3),....... satisfies a_(1)=1,a_(2)=2 and a_(n+2)=(2)/(a)(n+1),n=1,2,3,

If a_(n) is a geometric sequence with a_(1)=2 and a_(5)=18, then the value of a_(1)+a_(3)+a_(5)+a_(7) is equal to

If a_(1),a_(2),a_(3),a_(4),a_(5) are in HP, then a_(1)a_(2)+a_(2)a_(3)+a_(3)a_(4)+a_(4)a_(5) is eqiual to

. If a_(1),a_(2),a_(3),...,a_(2n+1) are in AP then (a_(2n+1)+a_(1))+(a_(2n)+a_(2))+...+(a_(n+2)+a_(n)) is equal to