Question

x+ 1/x = 5 , x² + 1 /x²= ? , x⁴+ 1/x² = ?​

Answer 1

Answer:

x+1/x=√5

(x+1/x)²=5

x²+1/x²+2=5

x²+1/x²=3

(x²+1/x²)²=9

x^4 + 1/x^4 +2=9

x^4 + 1/x^4=7 …………