Which cube root function is always decreasing as x increases?

f(x) = RootIndex 3 StartRoot x minus 8 EndRoot
f(x) = RootIndex 3 StartRoot x EndRoot minus 5
f(x) = RootIndex 3 StartRoot negative (5 minux x) EndRoot
f(x) = Negative RootIndex 3 StartRoot x EndRoot + 5

Q&A Education