if s = 2t^3 - 5t^2 - 2 and t=2, is s increasing or decreasing?
i don't really get what im supposed to do here. how do i find which one it is?
i know how to find avg. V (or V) and avg. a (or a), but what do i do here?
thanks for any help, this question is stumping me
Hi mneox,
You have 2 choices,
depending whether you have covered differentiation or not.
Differentiation:
calculate the derivative
Now evaluate f'(2)
f(t) is increasing if f'(t) >0
f(t) is decreasing if f'(t)<0
Alternative
Work with the graph and examine f(2).
See attached sketch.