NDA 2018 Mathematics question

If is the harmonic mean of and , and is the arithmetic mean of and , then which of the following is/are correct? 1. 2. Select the correct answer using the code given below :

(A)1 only
(B)2 only
(C)Both 1 and 2Correct
(D)Neither 1 nor 2

Answer: (C)

Solution

and . 1: $2(α+) =

See the full step-by-step solution

Create a free account to read the complete working, and practise questions like this in a timed test.

Create a free account

Question ID VK-029035