অবক্ষেপন গুণাঙ্ক(S) বলতে কী বোঝ ?

Which of the following is not a criterion for congruence of triangles? S A S (b) S S A (c) A S A (d) S S S

Let S_(1), S_(2), ...... S_(101) be consecutive terms of A.P. If 1/(S_(1)S_(2)) + 1/(S_(2)S_(3)) + ...... + 1/(S_(100)S_(101)) = 1/6 and S_(1) + S_(101) = 50 , then |S_(1) - S_(101)| is equal to

If S_(1), S_(2) and S_(3) be respectively the sum of n, 2n and 3n terms of a G.P. Prove that S_(1) (S_(3)-S_(2))= (S_(2)-S_(1))^(2) .

If S_(1), S_(2), S_(3) be respectively the sums of n, 2n and 3n terms of a G.P., prove that, S_(1)(S_(3) - S_(2)) = (S_(2) - S_(1))^(2) .

If S_1 , S_2 and S_3 are respectively the sum of n, 2n and 3n terms of a G.P., then prove that S_1(S_3 - S_2) = (S_2 - S_1)^2 .

If S_(1), S_(2) , and S_(3) are, respectively, the sum of n, 2n and 3n terms of a G.P., then (S_(1)(S_(3)-S_(2)))/((S_(2)-S_(1)^(2)) is equal to

If a+b+c=2s, " then " [(s - a)^2 + (s -b)^2 + (s - c)^2 + s^2] =?

A+B + C = 2S implies sin S + sin (S -A) + sin (S - B) - sin (S - C) =