If x+1x=3, calculate x2+1x2,x3+1x3 and x4+1x4.
Find the degree
1) x4/4 -x3+2√2x+3
2) 1/x2(x3-x4+x8)
If x1,x2,x3,x4 are four positive real numbers such that x1+1x2=4, x2+1x3=1, x3+1x4=4 and x4+1x1=1, then