Question

k¯¹ + k =4 then k⁴ +k¯⁴=

Answer 1

Answer:

1/K+K=4

squaring on both sides

(1/K+K)= (4)²

1/K²+K²+21/KxK=16

k-²+K²=16-2

K-²+K²=14

squaring on both sides

k-⁴+k⁴+2=196

k-⁴+k⁴=194

Answer 2

Answer:

1/K+K=4

squaring on both sides

(1/K+K)= (4)²

1/K²+K²+21/KxK=16

k-²2+K²-16-2

K-²+K²=14

squaring on both sides

k-*+k¹+2=196

k-¹+k¹=194