Given a sequence of four numbers such that the first three are in G.P. and the last three are in A.P. with common difference 6. If the first and the fourth numbers are equals, then common ratio of the G.P. is
Let the last three numbers be a, a + 6, a + 12, so that the first three numbers are a + 12, a, a + 6. As these are in G.P.
If H is the harmonic mean between P and Q , then the value of (H / P) + (H / Q) is
If the sum of the series 2, 5, 8, 11, …… is 60100, then n is