Question

將一張紙對(duì)折三次，會(huì)得到多少層紙？對(duì)折四次呢？對(duì)折n次呢？

Answer 1

∵將一張對(duì)折一次時(shí)得到2層紙，
對(duì)折二次時(shí)得到2×2=2²層紙，
對(duì)折三次時(shí)得到2×2×2=2³層紙，
對(duì)折四次時(shí)得到2×2×2×2=2⁴層紙，
…，
∴對(duì)折n次時(shí)得到2ⁿ層紙．