1,1,2,6,(),(),(). 1,1,2,6,(24),(120),(720).规律是它们的扩大倍数依次增加1.如:1*1=1 1*2=2 2*3=6 6*4=24 24*5=120
巧填运算符号:6 6 6 6=1;6 6 6 6 =2;6 6 6 6=3;6 6 6 6=5;6 6 6 6=6;6 6 6 6=7;6 6 6 6=8 6÷6+6-6=16÷6+6÷6=2(6+6+6)÷6=36-(6+6)÷6=4(6×6-6)÷6=56+(6-6)×6=6(6×6+6)÷6=76+(6+6)÷6=8
213-76+24-2+4+21-2+6+1-76+47/2?4/2=
矩阵A=[1 1/3 5 7 9;3 1 2 6 1;1/5 1/2 1 3 1;1/7 1/6 1/3 1 2;1/9 1 1 1/2 1]特征根和特征向量 >;>;[d,v]=eig([1 1/3 5 7 9;3 1 2 6 1;1/5 1/2 1 3 1;1/7 1/6 1/3 1 2;1/9 1 1 1/2 1])d=0.7030-0.2257+0.5464i-0.2257-0.5464i-0.0145-0.6156i-0.0145+0.6156i0.6474 0.7551 0.7551-0.2106-0.0819i-0.2106+0.0819i0.1928 0.0527-0.0186i 0.0527+0.0186i 0.6270 0.62700.1222-0.0882+0.0929i-0.0882-0.0929i-0.1224+0.3167i-0.1224-0.3167i0.1858-0.1043-0.2231i-0.1043+0.2231i-0.1769-0.1737i-0.1769+0.1737iv=6.2725 0 0 0 00-0.5959+2.5643i 0 0 00 0-0.5959-2.5643i 0 00 0 0-0.0403+0.9765i 00 0 0 0-0.0403-0.9765i