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Suppose a function f(.) is defined in the following way:

f(1) = 3

f(2) = 10

f(3) = 1

We could write this function as the set { (1,3), (2, 10), (3,1) }.

The inverse of f(.), let me call it g(.) can be given by:

g(3) = 1

g(10) = 2

g(1) = 3

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Q: When a function contains points how do you find inverse of the points?
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