这个题关键是注意到6=7-1
6(7+1)(7^2+1)(7^4+1)(7^8+1)+1
=(7-1)(7+1)(7^2+1)(7^4+1)(7^8+1)+1
=(7^2-1)(7^2+1)(7^4+1)(7^8+1)+1
=(7^4-1)(7^4+1)(7^8+1)+1
=(7^8-1)(7^8+1)+1
=7^16-1+1
=7^16
这个题关键是注意到6=7-1
6(7+1)(7^2+1)(7^4+1)(7^8+1)+1
=(7-1)(7+1)(7^2+1)(7^4+1)(7^8+1)+1
=(7^2-1)(7^2+1)(7^4+1)(7^8+1)+1
=(7^4-1)(7^4+1)(7^8+1)+1
=(7^8-1)(7^8+1)+1
=7^16-1+1
=7^16