Question

if a+1/a=2, find a^3+1/a^3​

Answer 1

Step-by-step explanation:

a + 1/ a = 2

Cubing on both sides..........

(a+1/a)³ = 8

a³ + 1/a³ + 3 ( a + 1/a) = 8

a³ + 1/a³+ 3(2) = 8

a³ + 1/a³+ 6 = 8

a³ + 1/a³ = 2

Hope this helps you. Thanks