Question

Which matrix does not have an inverse?
http://prntscr.com/kqkaih
Last question @vocaloid

Answer 1

you might learn this shortcut later, but if one row is a multiple of another row, there is no inverse

so try to find the matrix where you can multiply one of the rows by a real number to get the next row

Answer 2

I think D. is the correct answer, it's an undefined matrix.

Answer 3

good

Answer 4

yay, thank you!!