Question 452128
The one-to-one function g is defined by 
g={(-7,-9),(6,3),(7,6),(8,-1)}
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"g" is a machine.  When you give it 7,
it gives you 6.
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Find the following...
g^-1(6)= ?
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"g^-1" is the same machine, but it is  running backward.
When you give it 6, it gives you 7.
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Ans: g^-1(6) = 7
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Cheers,
Stan H.