A community for students.
Here's the question you clicked on:
 0 viewing
znimon
 2 years ago
How do I find the domain of this function?
znimon
 2 years ago
How do I find the domain of this function?

This Question is Closed

znimon
 2 years ago
Best ResponseYou've already chosen the best response.1\[g(x) \sqrt{x^2  3x  40}\]

znimon
 2 years ago
Best ResponseYou've already chosen the best response.1I have \[\sqrt{(x8)(x+5)} \]

znimon
 2 years ago
Best ResponseYou've already chosen the best response.1The original problem is at the top.

Yahoo!
 2 years ago
Best ResponseYou've already chosen the best response.0Draw a number line and see for it

znimon
 2 years ago
Best ResponseYou've already chosen the best response.1I don't know what x can't be though

znimon
 2 years ago
Best ResponseYou've already chosen the best response.1I know the answer but I don't know how to get the answer.

Yahoo!
 2 years ago
Best ResponseYou've already chosen the best response.0(infinity , 5] U [8 , infinity)

znimon
 2 years ago
Best ResponseYou've already chosen the best response.1yeah but how do I find that?

Yahoo!
 2 years ago
Best ResponseYou've already chosen the best response.0just do trial and error method...)

Yahoo!
 2 years ago
Best ResponseYou've already chosen the best response.0luk for the vlue of x which satisfies this...

znimon
 2 years ago
Best ResponseYou've already chosen the best response.1There must be a logical way to find the answer, right?

ganeshie8
 2 years ago
Best ResponseYou've already chosen the best response.2(x8)(x+5) >= 0 its a parabola, right ?

znimon
 2 years ago
Best ResponseYou've already chosen the best response.1I could input it into my graphing calculator but other wise I don't know how to tell if its a parabola or not.

ganeshie8
 2 years ago
Best ResponseYou've already chosen the best response.2y = ax^2 + bx + c is a parabola

ganeshie8
 2 years ago
Best ResponseYou've already chosen the best response.2any quadratic function gives a parabola graph

ganeshie8
 2 years ago
Best ResponseYou've already chosen the best response.2can you find the x intercepts ?

ganeshie8
 2 years ago
Best ResponseYou've already chosen the best response.2once you find xintercepts, you would know where the parabola dips into x axis (goes negative)

ganeshie8
 2 years ago
Best ResponseYou've already chosen the best response.2dw:1346519548989:dw

znimon
 2 years ago
Best ResponseYou've already chosen the best response.1Oh ya that would be the point at which the g(x) function is 0, so its x  8 = 0, x = 8, x+ 5 = 0, x=5, and since its a parabola the graph only passes through zero twice. Nice dude, so the domain is (infinity, 5] U [8, +infinity]

ganeshie8
 2 years ago
Best ResponseYou've already chosen the best response.2yeah nice you got it :)

znimon
 2 years ago
Best ResponseYou've already chosen the best response.1Awesome, thanks again. Is there a way I could recognize any graph's shape or at least some and would you recommend memorizing those?

ganeshie8
 2 years ago
Best ResponseYou've already chosen the best response.2if the degree is 2, then its a parabola

ganeshie8
 2 years ago
Best ResponseYou've already chosen the best response.2finding domains for other polynomials is bit tricky... as they may dip into xaxis multiple times

ganeshie8
 2 years ago
Best ResponseYou've already chosen the best response.2do you knw sketching polynomilas (end behiavior thingy )

ganeshie8
 2 years ago
Best ResponseYou've already chosen the best response.2end behavior helps you sketch ANY polynomial freehand

znimon
 2 years ago
Best ResponseYou've already chosen the best response.1Thanks dude, I'll look it up

ganeshie8
 2 years ago
Best ResponseYou've already chosen the best response.2process is basically : 1) find x intercepts 2) using endbehavior sketch the graph by hand

ganeshie8
 2 years ago
Best ResponseYou've already chosen the best response.2its easy concept and worth learning... im sure you wil get hang of it in few minutes....... good luck :)

znimon
 2 years ago
Best ResponseYou've already chosen the best response.1why is it that a polynomial with a degree of two is a parabola?

ganeshie8
 2 years ago
Best ResponseYou've already chosen the best response.2uhh il have to think...... idk exactly... i think it has something to do with local maximum/minimum + increasing/decreasing thingy. we need to turn to calculus for proper understanding. im also learning... . so im no good for answering this :(

ganeshie8
 2 years ago
Best ResponseYou've already chosen the best response.2@mukushla @eliassaab @experimentX

znimon
 2 years ago
Best ResponseYou've already chosen the best response.1Oh, I have enough to learn for now so it doesn't matter to me. I bet I wouldn't understand the explanation if it involves terms I've never had before haha.
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.