We can only take inverses of square matrices.
I see 2 numbers in the first row, but 3 in the second row.
Are there supposed to be brackets?
Is it
i 3
(1+i) - i
??
Find the inverse of each of the following matrices, if possible
[i 3
1+i -i]
4 answers
yes. so
i 3
(1+i) (-i)
i 3
(1+i) (-i)
the i and 3 are separate as well
in general the inverse of
a b
c d
is
1/(ad - bc)
times
d -b
-c a
e.g.
5 4
2 2
inverse is
1/(10-8)
times
2 -4
-2 5
=
1 -2
-1 2.5
Apply this rule to your matrix
a b
c d
is
1/(ad - bc)
times
d -b
-c a
e.g.
5 4
2 2
inverse is
1/(10-8)
times
2 -4
-2 5
=
1 -2
-1 2.5
Apply this rule to your matrix
2 answers