Question

ifX2+1/81X2=2,find 3X-1/3X​

Answer 1

Answer:

727

Step-by-step explanation:

9x2 + (1/9x2) = (3x – (1/3x))2 + 2

= (5)2 + 2 = 25 + 2 = 27

(ii) 81x4 + (1/81x4) = (9x2 + (1/9x2))2 – 2

= (27)2 – 2 = 729 – 2 = 727

hope this helps you!