If m =7 -43 , then (m+1/m)=?
If m =7 -43 , then (m+1/m)=? Correct Answer 4
Given , m = 7 - 4 3⇒1m = 17 - 43⇒1m = 7 + 43(7 - 43)(7 + 43)⇒1m = 7 + 4372 - (43)2⇒1m = 7 + 4349 - 48.'. 1m = 7 + 43We know, (m + 1m)2 = (m)2 + 2.m.1m + (1m)2 = m + 2 + 1m = 7 - 43 + 2 + 7 + 43 = 16.'.m + 1m = 16 = 4