Given that f(x) = pi^x + x^pi + 2^x + x^2, what is the range of f(x) on the interval [0, ∞)? Give your answer in interval notation.
When x = 0 the equation becomes
1 + 0 + 1 + 0 = 2
as x increases toward infinity , so does the value of the function
so range [2, + inf)