Question

if a²+1/a²=18, fibd the value of a³-1/a³​

Answer 1

Answer:

answer will various from positive or negative number

Step-by-step explanation:

given,. a^2 + 1 / a^2 = 18

a^2 + 1 = 18 a^2

17 a^2 = 1

a = 1/√17 , - ( 1/√17 )

now,. a^3 - 1 / a^3

= 1 - ( 1/a^3) ( when. a is positive )

= -69.0927

if a is negative,.

= 71.0927

answer are both