n arithmetic means are inserted in between x and 2y and then between 2x and y. In case…
Mathematics · JEE Main · NTA Exams — Progression and Series
n arithmetic means are inserted in between x and 2y and then between 2x and y. In case the rth mean in both cases be equal, then the ratio x/y is
- \(\frac{r}{n-r+1}\)
- \(\frac{n+r-1}{r}\)
- \(\frac{n-r+1}{r}\)
- None of these
Answer
(C) n-r+1 r
Sign up free on Edukali to view the step-by-step worked solution and practice thousands of similar questions.
Related practice questions
- If t _ n = 1 4 ( n +2)( n +3) for n = 1, 2, 3, .........., then 1 t_ 1 + 1 t_ 2 + 1 t_ 3 + + 1 t_ 2003 =
- If a, b, c are in G.P. and a 1/x = b 1/y = c 1/z then x, y, z are in
- If non-zero numbers a, b, c are in HP, and the straight line x a + y b + 1 c =0 always passes through a fixed…
- Three numbers form an increasing GP. If the middle number is doubled, then the new numbers are in AP. The…
- In the arithmetic progression 2, 5, 8, ... up to 50 terms and 3, 5, 7, 9, ... up to 60 terms, find how many…
- Find the sum of first 24 terms of an AP a 1 , a 2 , a 3 ....., if it is known that a 1 + a 5 + a 10 + a 15 +…
- If the sum of first p terms, first q terms and first r terms of an A.P. be x , y and z respectively, then x p…
- If e^ tin ^ 2 x+ ^ 4 x+ n _ e ^ 2 satisfies the quadratic equation x 2 - 9x + 8 = 0 and 0 < x < / 2 , 0 < sin…
More Progression and Series questions · Browse all practice questions