(1),a1*a2*a3=a2^3=27得a2=3,所以,q^2=a4/a2=2/3得q=开根号2/3
解a1即可得an.(2)a3=1/2a2*a4,所以,a3*a6=1/2*a2*a4*a6=1/2*q^3*a1*a3*a5,而a1*a2*a3*a4*a5*a6=q^3*(a1*a3*a5)^2=126解得a1*a3*a5=1所以,a3*a6=125/2
(1),a1*a2*a3=a2^3=27得a2=3,所以,q^2=a4/a2=2/3得q=开根号2/3
解a1即可得an.(2)a3=1/2a2*a4,所以,a3*a6=1/2*a2*a4*a6=1/2*q^3*a1*a3*a5,而a1*a2*a3*a4*a5*a6=q^3*(a1*a3*a5)^2=126解得a1*a3*a5=1所以,a3*a6=125/2