Question

根据下列条件计算丨m丨×丨n丨=0的值;1.m=0 n=-3 2.m =2 /3 n=-2 3.m=-4/5 n=-2/

Answer 1

m=0 n=-3 丨m丨×丨n丨= 0×3 =0

2.m =2 /3 n=-2 丨m丨×丨n丨= 2/3 × 2 = 4/3

m=-4/5 n=-2/3 丨m丨×丨n丨= 4/5 × 2/3 = 8/15

m=-0.25 n=-0.4 丨m丨×丨n丨= 0.25 × 0.4 = 0.1