determine the value of k for which the matrix(adsbygoogle = window.adsbygoogle || []).push({});

(2 4 1)

(k -1 2)

(7 7 4) has no inverse

apparantly the answer is k = 1 but I cant see how.

I worked it out to be -3

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Matrices math question homework

**Physics Forums | Science Articles, Homework Help, Discussion**