Question

a+1/a=1,then a³+1=?find the equation

Answer 1

Step-by-step explanation:

If a-(1/a)=5

Then (a-1/a)^2 =a^2–2+(1/a)^2=25

So a^2+(1/a)^2=27

So a³-(1/a³)

=(a-(1/a))*(a^2+(1/a)^2+1)

=5*(27+1)

=5*28

=140