Question

计算（2+1）乘以（2的平方+1）乘以(2的四次方+1）.乘以（2的2n次方+1）

Answer 1

(2+1)(2^2+1)(2^4+1)……(2^2n+1)

=(2-1)(2+1)(2^2+1)(2^4+1)……(2^2n+1)

=2^4n-1