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lecture_1
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| Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
| lecture_1 [2016/01/22 18:39] – rupert | lecture_1 [2016/01/22 19:13] (current) – old revision restored (2015/01/22 12:02) rupert | ||
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| - | ~~REVEAL~~ | ||
| ====== Chapter 1: Systems of linear equations ====== | ====== Chapter 1: Systems of linear equations ====== | ||
| Line 6: | Line 5: | ||
| ==== First example: a linear equation in two variables ==== | ==== First example: a linear equation in two variables ==== | ||
| - | Consider the equation | + | Consider the equation |
| This is an equation in two // | This is an equation in two // | ||
| - | * A [[solution]] of this equation is a pair of numbers $(a,b)\in \mathbb{R}^2$ so that if we replace $x$ with $a$ and replace $y$ with $b$, then the equation becomes true. | + | A [[solution]] of this equation is a pair of numbers $(a,b)\in \mathbb{R}^2$ so that if we replace $x$ with $a$ and replace $y$ with $b$, then the equation becomes true. |
| - | *In other words, so that $2a+5b$ really is equal to $7$. | + | |
| - | === test subhead === | + | In other words, so that $2a+5b$ really is equal to $7$. |
| * $(3,1)$ is not a solution, because $2\times 3+5\times 1\ne 7$ | * $(3,1)$ is not a solution, because $2\times 3+5\times 1\ne 7$ | ||
lecture_1.1453487985.txt.gz · Last modified: by rupert