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is the square root of x^2 -9 even or odd in symmetry?

Guest May 9, 2017
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Because replacing 'x' witn '-x' in the equation (and simplifying) shows no change, it is an even function.

 

sqrt( (-x)2 - 9 )  =  sqrt( x2 - 9 )

geno3141  May 10, 2017

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