true or false
the codomain of a linear transformation is a subset of the range.
if t is a linear transformation and v ∈ range(t), then there is at least one u in the domain such that t(u) = v
if t(x) is not a linear transformation, then t(rx) 6= rt(x) for all r and x.
if a linear transformation t : r3 → r3 is one-to-one, then it must be onto as well.
if t is a linear transformation, then t(0) = 0.