1.
(a) F
(b) T
(c) T
(d) F
(e) F
2. For W=span({(1, 2)}), [T]β=⎛⎝⎜⎜15252545⎞⎠⎟⎟.
3. (2)
(a) T1(a, b)=12(a+b, a+b) and T2(a, b)=12(a−b, −a+b)
(d) T1(a, b, c)=13(2a−b−c, −a+2b−c, −a−b+2c) and T2(a, b, c)=13(a+b+c, a+b+c, a+b+c)
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