if a=1-root2 find the value of a4 +1/a4 Share with your friends Share 0 Vishvesh Kumar answered this We have, a=1-21a = 11-2 = 11-2×1+21+2 = -1-2Now, a + 1a = -22squaring both sides, we geta2 + 1a2 + 2 × a × 1a = 8⇒a2 + 1a2= 8 - 2 = 6⇒a2 + 1a2= 6Squaring both sides, we get a4 + 1a4 + 2 × a4 × 1a4= 36⇒a4 + 1a4 = 36 - 2 = 34 1 View Full Answer
