If logx(81/16) = - 2, then x = ?

প্রশ্ন: If logx(81/16) = - 2, then x = ? সমাধান:দেওয়া আছে,logx(81/16) = - 2⇒ x- 2 = 81/16⇒ x- 2 = (9/4)2⇒ x-2 = (9/4)2 ⇒ x- 2 = 1/(4/9)2⇒ x- 2 = (4/9)- 2∴ x = 4/9