Hi Adury its not det X^7 but determinat of X^&. That is det of the matrix raised to the power 7 If you reply to this email, your message will be added to the discussion below: http://discussion-forum.2150183.n2.nabble.com/ISI-2011-Ques-21-tp7584959p7584963.html To start a new topic under General Discussions, email [hidden email] To unsubscribe from Discussion forum, click here. NAML