Question 85708
find (f of g)(x) and (g of f)(x) for f(x)=x-5 and g(x)=sqrt(x)-2.
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f[g(x)] = f[sqrt(x)-2] 
= sqrt(x)-2 -5
= sqrt(x) - 7
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g[f(x)]=g[x-5] 
=sqrt(x-5) -2
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Cheers,
Stan H.