1+2+3+3+3+2+1+1+2+3+4+5+6+7+7+8+8+7+19+11=

2 1 -2 -3 1,1,1,2,2,2,3,3,3,填三阶幻方 1+2-3-3-3-3=? （1+1/2+1/3+... 1,1/2,3/2,3/8,( ),( ) 1+1+2+2+3+3+````````````````````````````+99999 1/(2^3)+1/(2^3+1)+1/(2^3+2)+1/(2^3+3)+...+1/(2^4-1) 1+3+2+1+1x2+3 求证1/1+1/2^(3/2)+1/3^(3/2)…+1/n^(3/2) 3题 1、2、3 求四阶行列式：2 -1 3 2 3 -3 3 2 3 -1 -1 2 3 -1 3 -1 （1/2+1/3)÷(2/3-3/2)=? [-2*1/4+(-1/2)3]*(-2*2/3)+(-1*2/3)2÷5/3 -1-{(-3)²-[3+(2/3)*(-3/2)]/(-2)} 计算 (-1/3)^2除以(-1/3)^3*(1/3)^3除以3^-2*(-3)^0 [(2^3-1)(3^3-1)...100^3-1)]/[(2^3+1)(3^3+1)...(100^3+1)]=? 1^3+2^3+3^3+...+99^3+100^3 （2/3+3）(3-2/3x)+(-2/3-1)(1+2/3x)