(1+1/2)(1+1/2的2次方)(1+1/2的4次方)(1+1/2的8次方)+1/2的15次方.

问题描述:

(1+1/2)(1+1/2的2次方)(1+1/2的4次方)(1+1/2的8次方)+1/2的15次方.
用平方差公式

(1+1/2)(1+1/2的2次方)(1+1/2的4次方)(1+1/2的8次方)+1/2的15次方
=(1-1/2)(1+1/2)(1+1/2的2次方)(1+1/2的4次方)(1+1/2的8次方)/(1-1/2)+1/2的15次方
=(1-1/2的2次方)(1+1/2的2次方)(1+1/2的4次方)(1+1/2的8次方)/(1-1/2)+1/2的15次方
=(1-1/2的4次方)(1+1/2的4次方)(1+1/2的8次方)/(1-1/2)+1/2的15次方
=(1-1/2的8次方)(1+1/2的8次方)/(1-1/2)+1/2的15次方
=(1-1/2的8次方)/(1+1/2的8次方)/(1/2)+1/2的15次方
=(1-1/2的16次方)*2+1/2的15次方
=2-1/2的15次方+1/2的15次方
=2.