b3+b5=10
b3(1+q²)=10
b2+b4=10/3
b2(1+q²)=10/3
(1+q²)=10/(3b2)
b3*10/(3b2))=10
b3/(3b2)=1
b3/b2=q=3
b3(1+3²)=10
b3=1
b4=b3*q=3
b3+b5=10
b3(1+q²)=10
b2+b4=10/3
b2(1+q²)=10/3
(1+q²)=10/(3b2)
b3*10/(3b2))=10
b3/(3b2)=1
b3/b2=q=3
b3(1+3²)=10
b3=1
b4=b3*q=3