MATH 2211 Quiz: Quiz7S11mt210Sample2Ans
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Let t : r3 r3 be the linear transformation de ned by (x1, x2, x3) 7 (x1 + x2 + x3, x1 x2 x3, x1 x2 + x3). A linear transformation t is invertible if and only if the standard matrix a of t is invertible. The standard matrix of t is a = . We observe that a is invertible and a 1 = . 2 vertible and t 1(x) = a 1x or ( 1)r1+r2 r2 ( 1)r1+r3 r3.
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