x - 1/x = 6 হলে x/(x2 + 7x - 1) এর মান-
সমাধান
সঠিক উত্তর: 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
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