17-05-2016
Mathematics

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What is the domain of the function f (x) x-5/x^2-9

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18-05-2016

means the number you can use
remember we can't divide by zero
domain is x^2-9
set to zero to find values we can't use
x^2-9=0
x^2=9
x=+/-3

domain=all real numbers except -3 and 3

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