In math, the purpose of Cramer's rule is to be able to find the solution of a system of linear equations by using determinants and matrices. Cramer's rule makes it easy to find a system of equations that have many unknown variables.
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the cramers rule is applied on matrices
Yes I can. I did it in QBasic about 15 years ago.
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Well.. the purpose of the slide rule is that, to count, add, subtract, multiply, and divide. For as its structure is like a ruler and has a transparent slider. It is the type of a cursor, used for pointing out the numerals/ numbers. It is the third calculator invented, after Napier's bones. It was invented by Napier, as well.
The BODMAS rule was not discovered: it was invented as a convention. The purpose in setting out the convention was so that calculations were carried out in the same way by different people and at different times.