1/16; 0.25; 1 ; ...b1*b2*b3*b4*b5*b6*b7 = b1* b1q*b1q^2*b1q^3*b1q^4*b1q^5*b1q^6=b1^7*q^21=(b1q^3)^7=(b4)^7b4=b3qq=b3/b2=1/0.25=4b4=1*4=4(b4)^7 = 16384
1/16; 0.25; 1 ; ...
b1*b2*b3*b4*b5*b6*b7 = b1* b1q*b1q^2*b1q^3*b1q^4*b1q^5*b1q^6=b1^7*q^21=(b1q^3)^7=(b4)^7
b4=b3q
q=b3/b2=1/0.25=4
b4=1*4=4
(b4)^7 = 16384