2 -1 -1 10 1 2 40 0 -2 00 0 0 0这个算不算个阶梯型矩阵,为什么?

(10+1)(10^2+1)(10^4+1)(10^8+1).(10^32+1)=? 1+1-1-1-2-3-1+10 1 2 5 10 10,1,2问, 10、1、2题 (1/2)^10 10、(1)(2)(3) 10^2n+1+10^2n-1/10^2n+1-10^2n-1 |1-1/2|-|1/2-1/3|-|1/3-1/4|-.-|1/9-1/10| |1-1/2|+|1/2-1/3|+|1/3-1/4|+...|1/9-1/10| [10^(1/2)-20^(1/2)]^2 ((1/2)-1)*((1/3)-1)*((1/4)-1)*((1/5)-1)*((1/6)-1)*((1/7)-1)*((1/8)-1)*((1/9)-1)*((1/10)-1) （1+1/2)*(1+1/4)*.*(1+1/10)*(1-1/3)*(1-1/5)*.(1-1/9)简算 (1-1/2*2)*(1-1/3*3)*…...*(1-1/10*10)=? 求和2(1-1/2)+3(1-1/3)+……+10(1-1/10)= (1-1/2^2)*(1-1/3)*(1-1/4^2)*…*(1-1/9^2)*(1/10^2) (1/10-1)(1/9-1)(1/8-1).(1/2-1)简便计算 /1/3-1/2/+/1/4-1/3/+/1/5-1/4/+.+/1/10-1/9/