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Introduction |
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We use alphabets like x, y, z etc., to denote variables. For example the length of a rectangle is denoted by 'l'. It takes different values in different rectangles. A formula is a relation between different variables formed using mathematical symbols. Any given condition can be translated into a formula using variables and mathematical symbols. Volume of a cuboid is the product of length, breadth and height. This is written as V = l x b x h. We say that this is the formula for the volume of the cuboid. |
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Formula |
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A formula is formed by using:
(a) mathematical symbols and variables
(b) given conditions, and
(c) simplification. |
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Change of subject of formula |
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In the formula  I is called the subject of the formula. |
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To make 'P' the subject of the formula:
P x T x R = 100 x I |
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Summary |
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In a given sentence, the variables are replaced by letters and the different operations are replaced by their mathematical symbols. We now arrive at a formula.
If a formula gives 'x' in terms of the other variables, x is called the subject of the formula.
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Framing of Formulae |
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All Subjects
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