Here is the question:
I have posted a link there to this thread so the OP can view my work.Calculus help???! 10 points for quickest answer?
I'm trying to answer this question and I'm having a bit of a struggle
Consider the polynomial function f(x)= -5x^4+4x
a) Determine the x and y intercepts
y intercept: (at 0) = 0
x intercept (at 0) = 4/5
b) Determine the coordinates of the critical points
Critical points are 3/5 and 0.
c) Identify the nature of critical points
x<0 it's positivie
0<x<3/5 it's positive
x<3/5 it's negative
d) Determine the coordinates of the points of inflection
I got (2/5, 0.128) and (0,0)
e) Graph the function
Having trouble doing this..??? Help!
f) State the intervals of increase and decrease
g) State the intervals of concavity
x<0 concaves down
0<x<2/5 concaves up
x<2/5 concaves down
PLEASE show me how to sketch it..
Not sure if anyone is willing to do this but it's worth a try lol!