Question

If ( a*a+1/a*a)=23, find the values of : (i) (a+1/a) (ii) (a*a*a+1/a*a*a)​

Answer 1

Step-by-step explanation:

a²+1/a²=23

(a+1/a)²-2=23

(a+1/a)²=25

a+1/a=5

a³+1/a³

=(a+1/a)³-3(a+1/a)

=(5)³-3(5)

=125-15

=110