[A] Question 6: Intermediate Algebra

Some might find this familiar.

Given that ${ x }_{ n+1 }={ x }_{ n-1 }^{ 2 }-n{ x }_{ n }$ , ${ x }_{ 0 }=3,\quad { x }_{ 1 }=4$ ,

find ${ x }_{ 982 }$ .

Extra:

Find the general term for ${ x }_{ n }$ .