college algebra
posted by Carol on .
Can anyone please help me with this?
for the function f(x) =1/x....f(x)is increasing on the interval(s) and f(x) is decreasing on the interval(s)???

Recall that f increases where f' > 0
f = 1/x
f' = 1/x^2
f' < 0 for all x ≠ 0
Think about the graph. It's a hyperbola, and is always decreasing, on both sides of the vertical asymptote at x=0.