The number k is such that `tan{arctan(2) + arctan(20k)} =k`. The sum of all possible values of k is

The number k is such that tan { arc tan (2) + arc tan (20 k) } = k . The sum of all possible values of k is

The number k is such that tan { arc tan (2) + arc tan (20 k) } = k . The sum of all possible values of k is

The number k is such that tan { arc tan (2) + arc tan (20 k) } = k . The sum of all possible values of k is

If a_1,a_2,a_3 are in G.P. having common ratio r such that sum_(k=1)^n a_(2k-1)= sum_(k=1)^na_(2k+2)!=0 then number of possible value of r is (A) 1 (B) 2 (C) 3 (D) none of these

The roots of the eqution x^(2)-(k-1)x+(k+2)=0 are alpha and beta Then the sum of all possible values of k for which these roots are related as 2 alpha+5 beta=1 is

[" If the first term of an A.P is an integer with common difference "2" ,then the number of possible values of k for which the sum of first k terms is "153" is "(k>1)]

If 13 cos theta=12k-5 where 0lethetale90^(@) and k is an integer then number of possible value of k is