Question

Just checking my answer, what is the inverse of this matrix: 121
234
256

Answer 1

121
234
256

Answer 2

At the bottom

http://www.wolframalpha.com/input/?i=+ {{1%2C2%2C1}%2C{+2%2C3%2C4}%2C{+2%2C5%2C6}}

Answer 3

Copy and Paste the whole link.

Answer 4

answer will be
1/3 7/6 5/6
2/3 -2/3 1/3
-2/3 2/3 1/6

Answer 5

i agree wit csr21 :D

Answer 6

Here is a nice website which shows the actual steps behind computing the inverse so you can check your own:

http://www.math.odu.edu/~bogacki/cgi-bin/lat.cgi

Click the link that says "Calculating the inverse using row operations" It should be the fourth one from the top.

Answer 7

thanks guys!