In addition to the reflection activities below, re-read Section 6.2 Terminology and notation. Be sure you understand the new definitions introduced in this chapter, and spend some time committing it to memory.
Statement 7 of Theorem 6.5.2 says that every invertible matrix can be expressed as a product of elementary matrices. For a given invertible matrix, is there only one unique such expression, or are multiple such expressions possible? Explain.