Recent content by madglover

well now i am worse for wear, how would i do that? i thought the only way to find the complement to W is to use row reduction

ok i am very confused now i have the basis span{0,4,1} is that right i managed to reduce it i think to 1 0 0/0 0 1 -4/0

ooo i might have it i just read that i can interchange rows if so i am fine as i can let it become 1,-2,2/0 0,1,4/0 which i can easily reduce :D grrr rows not columns

for example if someone could show me even how to reduce [4,3 2,1] i would be fine i just don't understand how it is done

Homework Statement Let W be the subspace of R^3 spanned by the vectors v1=[2,1,-2] and v2=[4,0,1] Find a basis for the orthogonal complement of W Homework Equations None The Attempt at a Solution I can do this question except for the fact when i get the matrix in form...

I tried to apply lots of the basic energy conservations laws but get stuck when approaching an answer making me very depressed. Sympathy work well on here?

A crane uses its petrol engine to lift a beam of mass 103 kg by height h. The fuel burned loses 1 MJ (106 J) of chemical potential energy, 85% of this being transferred by heating to the air. The internal energy of the crane’s engine increases by 4.0×104 J, while that of the crane’s...