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討論串[中學] 根號
共 7 篇文章
內容預覽:
1 + (1/k)^2 + (1/(k + 1))^2. = [k^2 (k + 1)^2 + k^2 + (k + 1)^2] / (k(k + 1))^2. = [k^4 + 2k^3 + 3k^2 + 2k + 1] / [k(k + 1)]^2. = [k^2 + k + 1]^2 / [k
(還有59個字)
內容預覽:
[1+(1/1)^2+(1/2)^2]^(1/2)=[1+1+1/4]^(1/2) = 3/ 2=( 2+1)/(1*2). [1+(1/2)^2+(1/3)^2]^(1/2)=[1+1/4+1/9]^(1/2) = 7/ 6=( 6+1)/(2*3). [1+(1/3)^2+(1/4)^2]^(1
(還有326個字)
