Open In App

Aptitude | Algebra | Question 2

Like Article
Like
Save
Share
Report

The value of x+1/2x is given as 2, then find the value of 8x3+1/x3

(A)

40/3

(B)

20/7

(C)

28

(D)

40


Answer: (D)

Explanation:

x3 + 1/8x3 + 3.x.1/2x(x + 1/2x) = (x+1/2x)3

x3 + 1/8x3 + 3 = 23

x3 + 1/8x3 = 5

8x3 + 1/x3 = 5.8 = 40
 


Quiz of this Question
Please comment below if you find anything wrong in the above post


Last Updated : 31 Aug, 2021
Like Article
Save Article
Previous
Next
Share your thoughts in the comments
Similar Reads