3 2 -1 -3 -1 2 -1 3 1 -3 7 0 5 -1 -8 求此矩阵的轶求轶的时候是不是化成最简式，最后一行全变为零？我化出来最后一行一列负一消不掉

（1+1/2+1/3+... 2 1 -2 -3 1,1,1,2,2,2,3,3,3,填三阶幻方 1+3+2+1+1x2+3 1/(2^3)+1/(2^3+1)+1/(2^3+2)+1/(2^3+3)+...+1/(2^4-1) 1,1/2,3/2,3/8,( ),( ) 1+1+2+2+3+3+````````````````````````````+99999 1+2-3-3-3-3=? 求证1/1+1/2^(3/2)+1/3^(3/2)…+1/n^(3/2) [(2^3-1)(3^3-1)...100^3-1)]/[(2^3+1)(3^3+1)...(100^3+1)]=? 证明 1+1/1+1/1*2+1/1*2*3+.+1/1*2*3*...*n 1+1/1+2+1/1+2+3+---- +1/1+2+3+ ---- 3Q 求四阶行列式：2 -1 3 2 3 -3 3 2 3 -1 -1 2 3 -1 3 -1 1+1+1+2+1+3+1.100 1+1+1+2+2×3 3题 1、2、3 (3+1)(3^2+1)(3^3+1)(3^4+1)…(3^32+1)步骤 1+1/2-1/2+3-3+50-1