Professor Poirier | D710 | Fall 2024
Comment due Sunday, October 27
“I’m bad at math.”
Everyone on earth, probably
“I’m bad at math.” This is something I’ve heard from a handful of students (in different classes) over the last few years. It’s devastating to me to hear anyone say this about themselves…let alone my own students.
Continue reading6(a). True – The transpose of an invertible matrix is an invertible matrix
Ex:
A=
det(A) = -2*-1/2 – 3/2 = -1/2
A^T=
det(A^T) = -2*-1/2 – 3/2 = -1/2
6(b). False – Every system of linear equations has exactly one solution
Infinite Solutions:
x+y=1, 2x+2y=2
2x+2y=2 is basically x+y=1 when divided by 2.
Graph:
No Solutions:
x+y=0, x+y=1
One Solutions:
x+2y=1, 2x+2y=2
Intersects at (1,0)
Monday, October 14 to Sunday, October 20
Monday 10/14 is a holiday and next Tuesday 10/15 follows a Monday schedule, so we meet Tuesday and Wednesday this week
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