(3+1)*(3^2+1)*(3^4+1)*(3^8+1)*……*(3^256+1)

来源:百度知道 编辑:UC知道 时间:2024/09/24 22:49:44
1、(3+1)*(3^2+1)*(3^4+1)*(3^8+1)*……*(3^256+1)
2、24690/(123456^2-12345*12347)

1、原式=(3-1)(3+1)(3^2+1)...(3^256+1)/(3-1)
=(3^512-1)/2
2、令123456=X
原式=24690/[X^2-(X-1)(X+1)]
=24690/1
=24690

1、(3+1)*(3^2+1)*(3^4+1)*(3^8+1)*……*(3^256+1)
=(3-1)*(3+1)*(3^2+1)*(3^4+1)*(3^8+1)*……*(3^256+1)÷(3-1)
=(3^2-1)*(3^2+1)*(3^4+1)*(3^8+1)*……*(3^256+1)÷(3-1)
=(3^4-1)*(3^4+1)*(3^8+1)*……*(3^256+1)÷(3-1)
……
=(3^512-1)÷(3-1)
=(3^512-1)÷2

2、24690/(123456^2-12345*12347)
=24690/[123456^2-(12346-1)*(12346+1)]
=24690/[123456^2-12346^2+1]
=24690/1
=24690