一道数学题,在线等,急!!! :(2+1)*(2^2+1)*(2^4+1)*~~~~~~*(2^64+1)+1的值.
2个回答
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(2+1)(2^2+1)(2^4+1)……(2^64+1)+1
=(2-1)(2+1)(2^2+1)(2^4+1)……(2^64+1)+1 {2-1的值是1,任何数乘以1都得原数,所以(2+1)(2^2+1)(2^4+1)……(2^64+1)乘上(2-1)值不变}
=(2^2-1)(2^2+1)(2^4+1)……(2^64+1)+1
=(2^4-1)(2^4+1)……(2^64+1)+1
=(2^64-1)(2^64+1)+1
=2^128-1+1
=2^128
=(2-1)(2+1)(2^2+1)(2^4+1)……(2^64+1)+1 {2-1的值是1,任何数乘以1都得原数,所以(2+1)(2^2+1)(2^4+1)……(2^64+1)乘上(2-1)值不变}
=(2^2-1)(2^2+1)(2^4+1)……(2^64+1)+1
=(2^4-1)(2^4+1)……(2^64+1)+1
=(2^64-1)(2^64+1)+1
=2^128-1+1
=2^128
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