SOLUTION: I'm sorry for asking this question once again, but the way I typed up the question did not properly explain that it was written as m_2,2 not m_22. Find m_(base)2,2 of the matrix

Algebra ->  Matrices-and-determiminant -> SOLUTION: I'm sorry for asking this question once again, but the way I typed up the question did not properly explain that it was written as m_2,2 not m_22. Find m_(base)2,2 of the matrix      Log On


   

Question 985883: I'm sorry for asking this question once again, but the way I typed up the question did not properly explain that it was written as m_2,2 not m_22.
Find m_(base)2,2 of the matrix:
[ 3 2 7
1 -2 4
5 3 -1]
Thank you kindly for your help and time.
Answer by ikleyn(52879) About Me  (Show Source):
You can put this solution on YOUR website!

m[2,2] = -2.

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When people use matrices,  they may use different  (various, distinct)  notations for their elements,  like m[2,2],  m%5B2%2C2%5D,  m%5B22%5D.

All these notations mean the same:  the element of the matrix located in the intersection of the second row  (first index 2)  and the second column  (the second index 2).