Let `{t_(n)}` be a sequence of integers in G.P. in which `t_(4):t_(6)=1:4 and t_(2)+t_(5)=216.` then `t_(1)` is

Let {t_n} be a sequence of integers in G.P. in which t_4: t_6=1:4a n dt_2+t_5=216. . Then t_1i s 12 b. 14 c. 16 d. none of these

If G.P if t_(1)=(1)/(5) and t_(2)=(1)/(25) then the common ratio is ___.

In a G.P. t_(2)=(3)/(5) and t_(3)=(1)/(5) . The the common ratio is ____.

If the sequence t_(1), t_(2), t_(3), … are in A.P. then the sequence t_(6), t_(12), t_(18),… is

The point of intersection of the tangent at t_(1)=t and t_(2)=3t to the parabola y^(2)=8x is . . .

The activity of a sample of a radioactive material is A_(1) at time t_(1) and A_(2) at time t_(2) , ( t_(2) gt t_(1)) . Its mean life is T. Then ______ .

Let T be the set of all triangles in a plane with R a relation in T given by R ={(T _(1) , T _(2)): T _(1) is congruent to T _(2) } Show that R is an equivalence relation.

If t_(n)" is the " n^(th) term of an A.P., then t_(2n) - t_(n) is …..