Question

what is the end behavior of this?

Answer 1

f(x)=-x^4-2x^3+3x+9

Answer 2

We would need to graph it.

Answer 3

ok

Answer 4

https://www.desmos.com/calculator/nbrk7jr5gv

Answer 5

And look at both ends of the parabola and see which direction they go in.

Answer 6

ok

Answer 7

And this might help you.
http://www.purplemath.com/modules/polyends.htm

Answer 8

well they are both going negative i think

Answer 9

since the highest degree is even we know this will be a smiley or frowny, since its a negative coefficient we know it will be frowny

Answer 10

wait i think i found it lol

Answer 11

um its infinity, negative infin. ,negative infin, negative infin

Answer 12

http://www.wolframalpha.com/input/?i=what+is+the+end+behavior+of+f%28x%29%3D-x^4-2x^3%2B3x%2B9

Answer 13

@TheSmartOne

Answer 14

did i get it right?

Answer 15

yes both go to \(\ -\infty\)

Answer 16

yes they**

Answer 17

they are all negative except the one