" common difference d of the A.P.in which "T_(7)=9" and "T_(1)T_(2)T_(7)" is least is "(k)/(10)" then "k=

The common difference d of the A.P. in which T_(7) = 9 and T_(1)T_(2)T_(7) is least is

If the common difference of the A.P.in which T_(7)=9 and T_(1)T_(2)T_(7) is least,is' d' then 20d is -

Find the common difference ( d) for an A.P., if t_(3) = 8 and t_(4) = 12 .

The value of common difference of an AP. which makes T_1·T_2·T_7, least, given that T_7 = 9 is A. 33/2 B. 5/4 C. 33/20 D. 5/8

Let T_(r) be the r^(th) term of an A.P whose first term is a and common difference is d IF for some integer m,n,T_(m)=(1)/(n) and T_(n)=(1)/(m) then a-d=

If a series T_(1)+T_(2)+T_(3)+...+T_(n) is in AP with common, difference d, then the terms T_(1),T_(4),T_(7),... are in AP with, common difference.