Question

Cubic function help? x^3+x+31

Answer 1

so... what are we doing again?

Answer 2

3x^2 +1
is the answer of it

Answer 3

Me and a guy have been stuck on this problem for like an hour. He was given a horrible example for a cubic function, and is determined to figure it out. But it's weird, and missing a peice, so you can't factor by grouping. It's x^3+x+31=0. How did you find that @Haseeb96

Answer 4

x^3+x+31 = 3x^2 +1 ?

Answer 5

x^3+x+31=0 so find "x" ?

Answer 6

How? We need an explanation.. I guess.

Answer 7

How did both of you get 3x^2+1?

Answer 8

hmm I didn't, I wonder that myself

Answer 9

3x^2+1 is the derivative of that function.. Exactly what is it that you are asked to do?

Answer 10

I think he's explaining it. What do you mean by derivative?

Answer 11

something tells me isn't a calculus question

Answer 12

I take it you're not in calculus yet, so that won't help you too much. haha

Answer 13

I don't really know. He was given that bobo example. I don't know why he couldn't just give him a regular one. I'm in Pre-Cal Honors.

Answer 14

This_Is_Batman derivative is a way to get a slope of a curve, calculus material though

Answer 15

f(x)=x^3+x+31
you are going to find its derivative
according to the formula of Power function
since,dx^n\dx = nx^n-1
df(x)\dx =d\dx (x^3+x+31)
apply power function in it
= 3x^2+1 +0
=3x^2+1
this is the solution of it

Answer 16

Oh, no. I'm homeschooled, so I'm pretty much teaching myself calculus... :c

Answer 17

@SolomonZelman Look at what Hasee said.

Answer 18

Lmao, DUDE!!!!!!!

Answer 19

That's what that first girl said, she just didn't fully explain it. -_-

Answer 20

@Haseeb96, can you explain this, or you just googled it, and got the answer thinking that the website you clicked is answering this question, when it was answering something else?

Answer 21

Yes, I would like it explained more thouroughly, too. I'm taking this class this year, and would like to be prepared. c:

Answer 22

@Haseeb96, maybe you can explain this?

Answer 23

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Answer 24

boys , this is the chapter of differtiablity.
in which we take the deriavtive of the function and get the answer....

Answer 25

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Answer 26

I am a female. -_-

Answer 27

I am a male, senior, turning 17.

Answer 28

I meant mail.

Answer 29

I'm a female, 16, Junior, pregnant. Who cares? :p And what do you mean you meant mail??? You spelled it right the first time..

Answer 30

i am also 17 years old....

Answer 31

Well, hasee is apparently 17, asian, and going to bed. -_-

Answer 32

Sorry @SolomonZelman , I really wanted to figure this out, but I have no idea how to do that derivative thing yet...

Answer 33

Me niether.

Answer 34

Before you get into doing derivates, it's important to have a good understanding of limits. Have you spent any time with those?

Answer 35

derivatives**

Answer 36

Nope. But I'm a year ahead in math, so I don't feel so dumb. :p Lol. I'm on FLVS, and only about a quater of the way through... Do you have a simple explanation? :D

Answer 37

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Answer 38

Really? -.- You have way too much fun on this website. :p

Answer 39

\(\huge\color{yellow}{\huge {\bbox[5pt,red,border:2px solid magenta ]{•‿•}}}\)

Answer 40

@Helloimjohn1234

Answer 41

I'm not sure what FLVS means.. haha. Limits are pretty simple at their root, but are used throughout college math. I'm currently finishing up Calc 3 and I still use them regularly.

The concepts are too long and detailed for me to type out on this page, but this website will probably be really helpful to you. Limits are the first thing you cover in Calc 1 so that's where this page starts. Do some reading!!

http://tutorial.math.lamar.edu/Classes/CalcI/LimitsIntro.aspx

Answer 42

Thank you so much @Helloimjohn1234 ! God bless you! c:

Answer 43

same