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asdlkj
35 Posts
Post any help you need, and since I'm guessing the majority of TL users are in college/been through college, legit help can be given (; Anyways, here is my question find the range of f(x) = 3x^2 + 2 if the domain is limited to {-4, -2, 2, 4} I don't know where to start here. All I know is the range has to be above 2 because of the "+2" in the equation. I'm guessing you're going to have to find x, square it, and multiply by 2. Which I don't know how to do. | ||
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SpiritoftheTunA
United States20903 Posts
yay | ||
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Rosettastoned
United States107 Posts
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Kenpachi
United States9908 Posts
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asdlkj
35 Posts
On September 08 2011 10:43 Rosettastoned wrote: What level of class is this (calcA/B, Precal) and i'll dumb it down from there :D Algebra 2. On September 08 2011 10:44 Kenpachi wrote: HW threads are generally unaccepted unfortunately. This thread is going to be closed. I don't see why one big thread is a problem though? | ||
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Kirb
Germany900 Posts
On September 08 2011 10:44 Kenpachi wrote: HW threads are generally unaccepted unfortunately. This thread is going to be closed. Rightfully so. o.o You are on the internet... solving simple maths probs shouldn't be that hard. | ||
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pugowar
United States142 Posts
for example f(-4) = 3*(-4)^2 +2 = 50 your range in this case would be just four values (or less if they overlap) (I think it is just 2 as this is parabola) You can punch the above into excel or into a scientific calculator and it will pop out the answer if you aren't the strongest at order of operations. the domain of f(x)=x^2 is all value greater then or equal to zero. the domain of f(x)=x^2 for -2<=x<=2 is all values between zero and 4. however since your have only four discrete domain values, your range is four or less discreet values. PM me if you need anything clarified. | ||
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0mgVitaminE
United States1278 Posts
use it use it use it Can basically do all of your homework for you | ||
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Rebornlife
Canada224 Posts
To the OP, sorry can't help ya. Anywho, if this stays open ill probably be posting as the year goes on, first year BPE/BED reporting. | ||
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asdlkj
35 Posts
On September 08 2011 10:43 SpiritoftheTunA wrote: plug in all four of those numbers and the range is [lowest,highest] yay I got -46 as the lowest.. Not sure what I'm doing wrong. Did 3 x -4^2 +2 and got -46. Fml math is not my subject ;/ | ||
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moltenlead
Canada866 Posts
Maybe ask a mod or something, I noticed a lot of them get closed. Otherwise I'm game. | ||
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GrapeD
Canada679 Posts
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asdlkj
35 Posts
On September 08 2011 10:46 pugowar wrote: The range is all possible F(x) values...basically what you will get when you plug the x values in. for example f(-4) = 3*(-4)^2 +2 = 50 your range in this case would be just four values (or less if they overlap) (I think it is just 2 as this is parabola) You can punch the above into excel or into a scientific calculator and it will pop out the answer if you aren't the strongest at order of operations. the domain of f(x)=x^2 is all value greater then or equal to zero. the domain of f(x)=x^2 for -2<=x<=2 is all values between zero and 4. however since your have only four discrete domain values, your range is four or less discreet values. PM me if you need anything clarified. You are a life saver man, you really simplify it. Thank you. On September 08 2011 10:48 Rebornlife wrote: To mods, this is a good idea, but boundries need to be stuck to. I say limit it to explanations of how to do problems etc, and no just giving straight answers. To the OP, sorry can't help ya. Anywho, if this stays open ill probably be posting as the year goes on, first year BPE/BED reporting. Yes, I just made a blog and got it closed. I think one big thread is a good idea. I'll put in the OP explanations only. I doubt most people just want the answers anyways, most people try to LEARN the material IMO. | ||
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Kirb
Germany900 Posts
On September 08 2011 10:48 asdlkj wrote: I got -46 as the lowest.. Not sure what I'm doing wrong. Did 3 x -4^2 +2 and got -46. Fml math is not my subject ;/ ^^ .... -4 ^2= -4x-4 = 16 | ||
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asdlkj
35 Posts
On September 08 2011 10:48 GrapeD wrote: This thread seems to defeat the point of homework to me. So you should just take it home, and not do anything because you don't know how? Homework is meant to show that you know the material, just because you're getting help doesn't mean you haven't learned the material. I'm going to stop arguing now, and I don't want this thread to go off topic any more. | ||
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jaerak
United States124 Posts
"This includes non-StarCraft related voting campaigns (vote for my friend in this contest!) or blatant threads asking for homework advice (how do I solve this equation??). TeamLiquid is not your personal army. It is not a substitute for Google or a tool for lazy students. We're here to discuss things and have fun, not for your own selfish needs." | ||
micronesia
United States24751 Posts
On September 08 2011 10:39 asdlkj wrote: I don't know where to start here. Open up your textbooks. Start reading about what domain and range are. If you want to plague a community with your simple math questions then use yahoo answers' homework help section. If you want help from me I charge $100/hour. | ||
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