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gladu [14]
3 years ago
13

Find the domain of the function algebraically q(r)=3square root r^2 -16

Mathematics
1 answer:
lawyer [7]3 years ago
4 0
Hello : 
q(r)=3<span>√(r²-16)
q  exist : r² - 16 </span><span>≥ 0
r² </span><span>≥ 16
</span>√r² ≥ √16
but :  √16 = 4    and  √r² = <span>|r |
</span>|r | ≥ 4
r ≤ 4 or  r  ≥ 4 
the domain is :  ] -∞, 4] ∪  [,4 , + ∞ [

 
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