Question

MEDAL!
Without using technology, describe the end behavior of f(x) = −3x38 + 7x3 − 12x + 13.

Down on the left, down on the right

Down on the left, up on the right

Up on the left, down on the right

Up on the left, up on the right

Answer 1

I think its A.. but im not positive! I just need reassurance!

Answer 2

yeah , you are right
the coefficient of the term which has the highest exponent is negative, and the degree is an even number so as x approaches negative infinity, y approaches negative infinity and as x approaches positive infinity, y still approaches negative infinity

Answer 3

Okay thanks! Can you help with one other?

Answer 4

i'll try :)

Answer 5

Graph the function f(x) = x4 − 7x3 + 12x2 + 4x − 12 using graphing technology and identify for which values of x the graph is increasing.

From x = −3 to x = −2

From x = −2 to x = −1

From x = 1 to x = 2

From x = 2 to x = 3

Answer 6

have you learned differentiating?

Answer 7

nope!

Answer 8

oh okay, it says there "using graphing technology", so it will be easy.

here's the graph
looking at it, can you tell me which intervals is the graph increasing?

Answer 9

Still need more help?

Answer 10

nope I got it! Ill close this~ thanks though~
:)

Answer 11

K, gl