原式=(3-1)(3^2+1)(3^4+1)(3^8+1)(3^16+1)/2=(3^32-1)/2
原式=(3-1)(3+1)(3^2+1)(3^4+1)(3^8+1)(3^16+1)/(3-1)=(3^2-1)(3^2+1)(3^4+1)(3^8+1)(3^16+1)/(3-1)=(3^4-1)(3^4+1)(3^8+1)(3^16+1)/(3-1)=(3^8-1)(3^8+1)(3^16+1)/(3-1)=(3^16-1)(3^16+1)/(3-1)=(3^32-1)/2