(2+1)(2^2+1)(2^4+1)(2^8+1)(2^16+1)…(2^2n+1)+1

2025-03-07 05:13:51
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回答1:

(2+1)(2^2+1)(2^4+1)(2^8+1)(2^16+1)…(2^2n+1)+1=(2+1)(2^2+1)(2^4+1)(2^8+1)(2^16+1)…(2^2n+1)(2-1)+1=(2^2+1)(2^4+1)(2^8+1)(2^16+1)…(2^2n+1)(2^2-1) =(2^2n-1)+1=2^2n 设两个奇数为X-1,X+1 (x-1)(x+1)+1=x^2-1+1=x^2 (10n+5)^2=100n^2+25+100n=(n+1)*n*100+25