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I need to show that the projection T: R2 -> R2 onto a vector v = [a, b] is a linear transformation.
Could anyone point me in the right direction?
Thanks
Start by using the definition of a linear transformation. You want to show that T(a + b) = T(a) + T(b) and T(ka) = kT(a).
"In the real world, this would be a problem. But in mathematics, we can just define a place where this problem doesn't exist. So we'll go ahead and do that now..."
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So would I try to show the defn of a L.T. using the projection of, say, x onto v. That is,
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