Let Mn.n(R) denote the vector space of n x n matrices with real entries. Let f : M2.2(R) → R be the function defined by f(A) = det (A) for any A E M2.2(R). Is f a linear transformation? [b11 b12 | b21 b22] a11 а12 Let A be any two matrices in M2.2(R) and let c E R. and B = a22 a21 a. f(A+ B) = -(a12 a21 + b12 a21 + a12b21 + b12 b21) · (Enter a11 as a11, etc.) f(A) + f(B) = (a11a22 - a12 a21) + (b11b22 - b12b21) Does f(A+ B) = f(A) + f(B) for all A, B E M2,2(R)? Yes, they are equal b. f(cA) = c(f(A)) =|| Does f(cA) = c(f(A)) for all c ER and all A E M2,2(R)? Yes, they are equal %3D c. Is f a linear transformation? f is a linear transformation

Linear Algebra: A Modern Introduction
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ISBN:9781285463247
Author:David Poole
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Chapter6: Vector Spaces
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Let Mn.n(R) denote the vector space of n x n matrices with real entries. Let f : M2.2(R) → R be the
function defined by f(A) = det (A) for any A E M2,2(R). Is f a linear transformation?
[b11 b12]
[b21 b22.
а11
a12
Let A =
and B =
be any two matrices in M2.2(R) and let c ER.
a21
а22.
a. f(A+ B) = -(a12 a21 + b12 a21 + a12b21 + b12 b21)
(Enter a11 as a11,
etc.)
f(A) + f(B) = (a11a22 - a12 a21)
+ (b11b22 - b12b21)
Does f(A+ B) = f(A)+ f(B) for all A, B E M2,2(R)? Yes, they are equal
b. f(cA) =
c(f(A) :
Does f(cA) = c(f(A)) for all c E R and all A E M2,2(R)? Yes, they are equal
c. Is f a linear transformation? f is a linear transformation
Transcribed Image Text:Let Mn.n(R) denote the vector space of n x n matrices with real entries. Let f : M2.2(R) → R be the function defined by f(A) = det (A) for any A E M2,2(R). Is f a linear transformation? [b11 b12] [b21 b22. а11 a12 Let A = and B = be any two matrices in M2.2(R) and let c ER. a21 а22. a. f(A+ B) = -(a12 a21 + b12 a21 + a12b21 + b12 b21) (Enter a11 as a11, etc.) f(A) + f(B) = (a11a22 - a12 a21) + (b11b22 - b12b21) Does f(A+ B) = f(A)+ f(B) for all A, B E M2,2(R)? Yes, they are equal b. f(cA) = c(f(A) : Does f(cA) = c(f(A)) for all c E R and all A E M2,2(R)? Yes, they are equal c. Is f a linear transformation? f is a linear transformation
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