Y=5x^4 -24x^3+24x^2+17 is concave down for which interval? A) x 0 C) x -2/5 D) x 2 E) 2/5 < x < 2 I know you take the second derivative...but I keep getting stuck with something that won't factor right?

Y=5x^4 -24x^3+24x^2+17 is concave down for which interval?

A) x<0
B) x>0
C) x<-2 or x>-2/5
D) x<2/5 or x>2
E) 2/5 < x < 2

I know you take the second derivative...but I keep getting stuck with something that won't factor right?

1 answer

Never mind, I got it!

Similar Questions

Consider the following function f(x)=x^2/[x^2-9]f(x) is increasing on the interval(s) f(x) is decreasing on the interval(s) f(x)
1. 2 answers
Consider the following function f(x)=x^2/[x^2-9]f(x) is increasing on the interval(s) f(x) is decreasing on the interval(s) f(x)
1. 1 answer
Find:(a) the interval(s) on which f is increasing, (b) the interval(s) on which f is decreasing, (c) the open interval(s) on
1. 0 answers
Find:(a) the interval(s) on which f is increasing, (b) the interval(s) on which f is decreasing, (c) the open interval(s) on
1. 2 answers