If f(x) = sqrt(x-10) and g(x) = -x, what is f+g and its domain?

1 Answer
Jan 14, 2018

f(x)=sqrt(x-10), g(x)=-x, so
f+g(x)=sqrt(x-10)-x

The domain would be x in [10, ∞) because sqrt0 is possible, but sqrt(-1) is a math error (you can look into that if you're interested, sqrt(-1) is termed i, stands for imaginary unit)