S1=1
S2=S1^2-2αβ=1-(-2)=3
S3=S1S2-(α+β)αβ=1*3-1*(-1)=4
S4=S1S3-S2αβ=S3+S2=3+4=7
Sn=Sn-1+Sn-2
S5=S4+S3=11 S6=11+7=18
α^7+β^7=S7=18+11=29
S1=1
S2=S1^2-2αβ=1-(-2)=3
S3=S1S2-(α+β)αβ=1*3-1*(-1)=4
S4=S1S3-S2αβ=S3+S2=3+4=7
Sn=Sn-1+Sn-2
S5=S4+S3=11 S6=11+7=18
α^7+β^7=S7=18+11=29