Math 213 at uwaterloo has publicly available notes in spades: https://www.gabrielwong.net/notes/math213_notes.pdf#page9 https://www.gabrielwong.net/notes/math21

Math 213 at uwaterloo has publicly available notes in spades: https://www.gabrielwong.net/notes/math213_notes.pdf#page9 https://www.gabrielwong.net/notes/math213_notes.pdf#page9