please do question number 10 and all its parts Page 4 is 200
please do question number 10 and all its parts
Solution
f(x)=sqrt(x-6) , g(x)=x^2 +8
gof(x)=g(f(x))=g(sqrt(x-6)) = x-6+8=x+2
domain
here the domain of input function that is of f(x) is x>=6 and the domain of gof(x) is all real numbers. Therefore domain is [6,infinity)
b.f(x)=x^2+5
domain
here their is no restriction on x.Therefore domain is (-inf,inf)
y=x^2 +5
switching x and y
x=y^2+5
y=sqrt(x-5)
and that\'s the inverse
and range is [5,inf)
