Matrix Multiplication +
There were four sheets handed out in class today which offer a wealth of practice on matrix multiplication, determinants, and inverses.
For Tuesday, homework is p.120-1 from the sheets handed out in class, #1a,2,3
If you want to check that your answers are correct, your TI calculator is a great friend for this!
Enter the dimensions and data of the first matrix (matrix -> edit -> A)
Enter the dimensions and data of the second matrix (matrix -> edit -> B)
Multiply the two of them together (matrix -> names -> A -> matrix -> names -> B -> enter)
Voila!
There are also examples worked out in detail on the sheets (in addition to the numerous questions done in class)
So, why are we doing this even though the calculator can do the work for us?
i) necessary skills to do other applications of matrices
ii) helpful when applying this to word problems
iii) if you have to multiply matrices which have variables instead of constant numbers, your calculator will not be up to the task (but you will!)
Presenting tomorrow:
The History of Pi
Triangle Centres
Creating a Sundial
The Mathematics of Gambling
On "stand-by" (should still be ready to present):
Number Systems
The Golden Ratio
For Tuesday, homework is p.120-1 from the sheets handed out in class, #1a,2,3
If you want to check that your answers are correct, your TI calculator is a great friend for this!
Enter the dimensions and data of the first matrix (matrix -> edit -> A)
Enter the dimensions and data of the second matrix (matrix -> edit -> B)
Multiply the two of them together (matrix -> names -> A -> matrix -> names -> B -> enter)
Voila!
There are also examples worked out in detail on the sheets (in addition to the numerous questions done in class)
So, why are we doing this even though the calculator can do the work for us?
i) necessary skills to do other applications of matrices
ii) helpful when applying this to word problems
iii) if you have to multiply matrices which have variables instead of constant numbers, your calculator will not be up to the task (but you will!)
Presenting tomorrow:
The History of Pi
Triangle Centres
Creating a Sundial
The Mathematics of Gambling
On "stand-by" (should still be ready to present):
Number Systems
The Golden Ratio
posted by Mr. Crane at 9:24 AM
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