Progression (Sequence and Series)Hard
Question
If first term of a decreasing infinite G.P. is 1 and sum is S, then sum of squares of its terms is-
Options
A.S2
B.1/S2
C.S2/(2S − 1)
D.S2/(2S + 1)
More Progression (Sequence and Series) Questions
If a,b,c are in A.P., then are in-...Sum to infinite of the series 1 + +....... is -...Let $a_{1},\frac{a_{2}}{2},\frac{a_{3}}{2^{2}},\ldots,\frac{a_{10}}{2^{9}}$ be a G.P. of common ratio $\frac{1}{\sqrt{2}...If p, q, r in harmonic progression and p & r be different having same sign then the roots of the equation px2 + qx + r =...The sum of the first n terms of the series 12 + 2 . 22 + 32 + 2 . 42 + 52 + 2 . 62 + ... is when n is even. When n is od...