Question

If a=3+2 under root 3,then find the value of a^2 + 1/9^2 and a^3+1/a^3

Answer 1

Step-by-step explanation:

a^2 +1/9^2

=(3+2)⅓²+1/81

=(25)⅓ +1/81

=8.33.... +0.012

=8.345....

a^3 +1/a^3

=(3+2)⅓³ + 1/(3+2)⅓³

=5 + 1/5

=5 + 0.2

=5.2