Composition of linear transformations

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SUMMARY

The discussion focuses on finding two linear operators T and U on R^2 such that the composition TU equals zero while UT does not. The operators are defined as T(x1, x2) = (0, x2) and U(x1, x2) = (x2, 0). The calculation shows that TU(x1, x2) results in (0, 0), confirming that TU = 0, while UT is not equal to zero. The composition of operators is correctly identified as (TU)(x) = T(U(x)).

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Homework Statement



Find two linear operators T and U on R^2 such that TU = 0 but UT ≠ 0.

The Attempt at a Solution



Let T(x1,x2)=(0,x2)

Let U(x1,x2)=(x2,0)
TU(x1,x2)=T(x2,0)=(0,0)

Am I right?

'Cause I can't remember if TU(x1,x2)=T[U(x1,x2)]

Or TU(x1,x2)=U[T(x1,x2)]
 
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Looks good to me!

And it's indeed

[tex](TU)(x)=T(U(x))[/tex]
 

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