18
The sum of twice a number and thrice its reciprocal is 25/2. What is the number?
- A7
- B6
- C5
- D4
Answer not set
Discussion 1
Log in or create a free account to reply and vote.
0
CCommunity
Let number be ‘x’ then its reciprocal be 1/x.
According to the question
2x + 3/x = 25/2
2x2 + 3 = 25x/2
4x2 + 6 = 25x
4x2 – 25x + 6 = 0
(4x – 1)(x – 6) = 0
x = 6
According to the question
2x + 3/x = 25/2
2x2 + 3 = 25x/2
4x2 + 6 = 25x
4x2 – 25x + 6 = 0
(4x – 1)(x – 6) = 0
x = 6