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| public:calculator:guides:dm32_simultaneos_equations [17/04/26 19:02 BST] – [Further Information] john | public:calculator:guides:dm32_simultaneos_equations [18/04/26 06:53 BST] (current) – [Use] john | ||
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| Line 35: | Line 35: | ||
| '' | '' | ||
| + | |||
| This is effectively | This is effectively | ||
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| The unknown matrix is obtained by multiplying '' | The unknown matrix is obtained by multiplying '' | ||
| + | They are entered sequentially in the order | ||
| + | '' | ||
| ===== Use ===== | ===== Use ===== | ||
| Line 58: | Line 61: | ||
| * < | * < | ||
| * Enter each value at the prompt followed by < | * Enter each value at the prompt followed by < | ||
| - | * Once all values '' | + | * Once all values '' |
| - | * < | + | * find the determinant |
| - | * Multiply | + | * this is not required for a simple solution, but might be useful for other purposes? |
| - | * < | + | * **I**nvert |
| - | * This gives the resulting '' | + | * < |
| + | * **M**ultiply | ||
| + | * < | ||
| + | * This gives the resulting '' | ||
| + | |||
| + | ===== Examples ===== | ||
| + | |||
| + | ==== 3 x 3 ==== | ||
| + | |||
| + | A system of equations with 3 unknowns '' | ||
| - | ===== Example ===== | ||
| '' | '' | ||
| - | '' | + | '' |
| - | '' | + | '' |
| < | < | ||
| - | You enter each value in sequence going **down the columns** | + | |
| + | Beware! | ||
| + | |||
| + | You enter each value in sequence going **down the columns** | ||
| + | |||
| + | Which is the opposite sense to the way matrices are entered in DM15L and DM41X | ||
| </ | </ | ||
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| - | {{tag> | + | {{tag> |
| Page created | Page created | ||
