For each of the following, determine if the function is increasing, decreasing, even, odd, and/or invertible on its natural domain: a)f(x) = sqrt{x-5} b)f(x) = {x}/{x^2+1} c)f(x) = x + 1 + {1/x} d)f(x) = |x| * sqrt{x}
a) increasing, even
b) decreasing, even
c) even, invertible
d) increasing, even, invertible