Hello could someone please help me with the following problems, I just couldn't find my way around it. Thanks!
1) Given the following:
A equals
1 2
1 -2
b equals
4
0
c equals
-3
-2
write c as a linear combination of column vectors a_1 & a_2
2) Let A equals
a_11 a_12
a_21 a_22
Show that if d = a_11 a_22 - a_21 a_12 is not equal 0, then
A inverse equals
1/d * ( {a_22 -a_12} {-a_21 a_11} ) ====> {row 1} {row 2}