5.Даны векторы a={2,1,-2} b={0,-1,2} найти : 1. (a, b) 2.|a| 3.(a+2b, a-b) 4.np(a)-(a+b) 5.a^-0 - орт а. 6.Даны векторы a=m-n; b=m+3n, где |m|=3; |n|=1; (m, N) = Пи/3 найти 1) (a, b) 2) |a| 3) (a, ^b) 4) np(b) - (a+b) ​
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