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16 Cards in this Set
- Front
- Back
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Inequalities (notations: <, >, ≤, ≥) |
x < 4 : 'x is less than 4' y > 4 : 'y is greater than 4' z ≤ 4 : 'z is less than or equal to 4' t ≥ 4 : 't is greater than or equal to 4' |
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What happens when solving an inequality with positive numbers? |
We use the same procedure as used for solving equations. |
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What happens when solving an inequality by multiplying or dividing with negative numbers? |
When solving inequalities we use the same method as solving equations, except for when we multiply or divide by a negative number. Here the inequality is reversed. 4 > -2 but multiplying by -2 gives -8 < 4 |
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Inequalities (number line, <, ≤) |
non-full dot: greater than or less than full dot: greater than/less than or equal to |
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What does it mean when there are more than one inequality sign? (4/9 < q < 5/9) |
In this example: q is greater than 4/9, but less than 5/9. |
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The Cartesian Plane (graph) |
A way to represent inequalities on a graph. |
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How do you show whether or not the line in the cartesian graph is included in the inequality shown? |
A broken line shows that the line is NOT included. A full line shows that the numbers are included. |
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Quadratic inequality |
A quadratic inequality is just like a quadratic equation, except instead of an equal sign there's an inequality. It is also solved in the same way as a quadratic equation. |
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Rules of indices? |
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Definitions: Ordinary number |
A whole number (2, 78, 7648...) |
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Definitions: Index form |
A number in the power of x E.g. 3 x 3 x 3 x 3 = 3 in the power of 4 |
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The formel for the volume of a cylinder? |
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Definitions: Evaluate (the following) |
To evaluate is to find the value of a numerical or algebraic expression. |
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Definitions: Rewrite (the following) |
To rewrite is to write something in a new way but with the same value E.g. 0,04 = 4% |
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Definitions: Simplify |
To simplify is to shorten the answer as much as possible. |
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the nth term |
A way to explain a sequence, by using the nth term. e.g. the numbers 3,5,7,9. They're numbered 1,2,3,4. The formula is 2n + 1 |
