Help! I'm a little stumped when it comes to variables in matrices. An explanation would be super rad!
1 answer:
Answer:
30
Step-by-step explanation:
To find the determinant of a 3x3 matrix, you can use this method. (See picture.)
Start with the first number in the top row, and block off the row and column. A 2x2 matrix will be left. Find the determinant of this 2x2 matrix, and multiply it by the number in the top row.
Repeat for the other two numbers in the top row. Add the first result, subtract the second, and add the third.
det A = -2 [(3)(-5) − (a)(0)] − 2 [(0)(-5) − (a)(0)] + b [(0)(0) − (3)(0)]
det A = -2 (3)(-5) − 0 + 0
det A = 30
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, with the respective midpoints of 
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However, you don't know the values of
at these points. At best you can approximate them, perhaps by interpolating (you have the details needed to do it, at any rate).
Are you sure you're not supposed to find the average temperature over the entire set of observation times, i.e. over
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The interval
which is approximated by
where the coefficient
However, you don't know the values of
Are you sure you're not supposed to find the average temperature over the entire set of observation times, i.e. over