Question

Let A be a 8 x 5 matrix with rank 4 and let b be a vector in R^8 (8 dimensional space). The four fundamental subspaces associated with A are R(A), N(A^T)(A transpose), R(A^T), N(A).

IF x is a vector in R(A) and A^(T)x = 0, then what can you conclude about the value of ||x||?

Answer 1

@amistre64 @TuringTest