# How do you evaluate a norm like this?

by GridironCPJ
Tags: evaluate, norm
 P: 44 ‖A(x+αz)-b‖_2^2 where A is an mxn matrix, x and z are vectors in R^n, b is a vector in R^m, and α is a scalar.
 Mentor P: 4,200 I don't really understand the question. A(x+αz)-b is a vector in Rm, so you just calculate its norm

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