x - 1/x = 6 হলে x/(x2 + 7x - 1) এর মান-

x - 1/x = 6 হলে x/(x² + 7x - 1) এর মান-

A 1/7

B 1/9

C 1/11

D 1/13

Correct Answer: Option D

দেওয়া আছে,
x - 1/x = 6
⇒ x² - 1/x = 6
⇒ x² - 1 = 6x

x/(x² + 7x - 1) = x/(x² - 1 + 7x)
= x/(6x + 7x)
= x/13x
= 1/13