Linear Transformation and Matrices

Consider the vector space RR3 over RR. The co-ordinates of (1, 2, 3)∈RR3 w.r.t. basis {(1, 0, 1), (0, 1, 1), (1, 1, 0)} of RR3 are:
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Consider the vector space RR3 over RR. Then which of the following is true?
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The order of following matrix is: (xx+yy+zz) \begin{pmatrix} x & x+y \\ y+z & z \end{pmatrix}
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Let T:T: RR2RR3 be a map. Then
A: TT(0, 0)=(0, 0, 0)
B: TT(-1, 2)=-TT(1, 2)
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Consider the vector space RR3 over RR. Let
A: Zero of the vector space is 0.
B: Additive inverse of (2, 3, 4)∈RR3 is 1/2, 1/3, 1/4
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