math
posted by michele .
What is the largest possible domain for the function
f(x) = sqrt x + sqrt(4  x^2) ?

sqroot(x)>=0
and
4x^2>=0
4>=x^2
x>=2 x<2
Negative numbers does not have a position on the number line.So:
Domain of
f(x)= sqrt(x) + sqrt(4  x^2)
[0,2]