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How does functions work?

Updated: 10/12/2022
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10y ago

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Let's illustrate with an example. The square function takes a number as its input, and returns the square of a number. The opposite (inverse) function is the square root (input: any non-negative number; output: the square root). For example, the square of 3 is 9; the square root of 9 is 3. The idea, then, is that if you apply first a function, then its inverse, you get the original number back.

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Zackery Schumm

Lvl 13
1y ago
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13y ago

F(n) = 3n-2

You substitute n with any number

so, for example, if i substituted 3 for the function above, i would get 7

There is an infinite number of solutions for a function.

Sometimes the substitution will already be given

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