dejanaejones dejanaejones

11-12-2021
Mathematics

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f(x)=5x+4, g(x) square root of x find the domain of gof

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bm20350 bm20350

11-12-2021

(gof)(x)=sqrt(5x+4)
If you do not include the imaginary plane, the square root can only take in values bigger than or equal to zero. So we just need to fix when 5x+4=0. That is when x=-4/5. So, the domain is [-4/5,inf)

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