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If f(x) is a function whose domain is [-1, 9] and g(x) = f(x^2), then the domain of g(x) is an interval of what width?

 

I think the answer is 81, but its wrong. 

 Apr 26, 2018
 #1
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g(x)  = f(x^2)

 

g(-1)  = f( [-1]^2)  =  f(1)

 

And

 

g(9)  = f(9^2)  = f(81)

 

The interval  is  [ 81   - 1 ]   =   80 units wide

 

 

cool cool cool

 Apr 26, 2018

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