Progression (Sequence and Series)Hard
Question
If 4 HM′s be inserted between 2/3 and 2/13, then the second HM is-
Options
A.2 / 5
B.2 / 7
C.2 / 11
D.2 / 17
More Progression (Sequence and Series) Questions
The HM between 1/21 and − 1/5 is -...The sum of the infinite series 12 + 22 x + 32 x2 + ..... is-...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...If p, q, r in harmonic progression and p & r be different having same sign then the roots of the equation px2 + qx + r =...If Sn denotes the sum of n terms of an A.P., then Sn+3 − 3Sn+2 + 3Sn+1 − Sn is equal to -...