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Shido88
 3 years ago
Determine the value of f(6), f(3/2), f(2c) and f(c+1), then simplify as much as possible
Question :
f(x) = 3x^2  4x
Shido88
 3 years ago
Determine the value of f(6), f(3/2), f(2c) and f(c+1), then simplify as much as possible Question : f(x) = 3x^2  4x

This Question is Closed

Aylin
 3 years ago
Best ResponseYou've already chosen the best response.1Well, in the first two, just take the appropriate number and plug it in where x is. Then simplify it down. For the third one (2c) replace x with 2c, then see what you get. Same for the fourth one. The first two are plug'n'chug, but if you need help with the second two I'll stick around.

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0the second two, just plug it in to every x in the problem ?

Aylin
 3 years ago
Best ResponseYou've already chosen the best response.1Mhm. So f(2c) would like\[f(2c)=3 \times (2c)^{2}4 \times (2c)\]

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0kinda dumb question but for the first one f(6) i did 6=3(6)^24(6) 6=108+24 6=132 then at this step do you add the 6 over or minus the 132 over ?? lol

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0it usually easier if one size has a (x)

Aylin
 3 years ago
Best ResponseYou've already chosen the best response.1Well, the left side is f(6) not 6. So when you get to f(6)=132, you are finished with that part.

Aylin
 3 years ago
Best ResponseYou've already chosen the best response.1Since you've found the value in the range (132) that corresponds to the value of 6 in the domain.

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0the second one i found is 3/4 hope its right

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0the third one i got: f(2c) = 4c

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0and do you divide the 2c over ?

Aylin
 3 years ago
Best ResponseYou've already chosen the best response.1Well, with these problems you only need to simplify the right side, don't worry about the left side at all. In the third and fourth ones your answer will be in terms of c though.

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0so is my answer for the third one okay ?

Aylin
 3 years ago
Best ResponseYou've already chosen the best response.1Well, no.\[(2c)^{2}=4c^{2}\]and there is nothing in there to cancel it, so you should have a c^2 term.

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0how did you get 2c^2 on the left side ?

Aylin
 3 years ago
Best ResponseYou've already chosen the best response.1\[f(2c)=3(2c)^{2}4(2c)\]and\[(2c)^{2}=4c^{2}\]so\[f(2c)=3 \times 4c^{2}4(2c)\]

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0oh so you can't multiply the term 4 with 2c ?

Aylin
 3 years ago
Best ResponseYou've already chosen the best response.1You can, but I was leaving it for you to do. :P

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0at first i thought u can make (2c)^2 = 4c and just X 3 = 12c

Aylin
 3 years ago
Best ResponseYou've already chosen the best response.1Pretty close, just forgot the ^2 part of it. :P

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0but why ? :O isn't it already been done on the 2c^2 ?why ^2 another

Aylin
 3 years ago
Best ResponseYou've already chosen the best response.1Well\[(2c)^{2}\]is the same thing as\[2c \times 2c\]Does that make it more clear?

Aylin
 3 years ago
Best ResponseYou've already chosen the best response.1\[2c \times 2c = 4c^{2}\]

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0omg...my mind is somewhere else today....sorry

Aylin
 3 years ago
Best ResponseYou've already chosen the best response.1Mine is too, don't worry.

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0so once i got f(2c) = 12c^2  8c then what can i do next?

Aylin
 3 years ago
Best ResponseYou've already chosen the best response.1Well, at this point all of the same powers of c are together, so you're done.

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0what do you mean by "same powers of c are together" ? :d

Aylin
 3 years ago
Best ResponseYou've already chosen the best response.1Well, there's only one c^2 term and only one c term. You can't combine the c^2 and the c terms, so there is nothing left to do.

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0the fourth one im stuck completely :D

Aylin
 3 years ago
Best ResponseYou've already chosen the best response.1Well, what is\[(c+1)^{2}\]?

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0c^2+2c+1 and i think u can factor it more right ?

Aylin
 3 years ago
Best ResponseYou've already chosen the best response.1Well, we don't want to factor it right now. So now\[f(c+1)=3 \times (c^{2}+2c+1)4 \times (c+1)\]Can you finish it from there?

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0i think it is : f(c+1)=3c^2 + 2c 1

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0your really good in math :D genius maybe?

Aylin
 3 years ago
Best ResponseYou've already chosen the best response.1Not really, I just want to teach math.

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0btw are you in college?

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0oh ! so your a teacher :D

Aylin
 3 years ago
Best ResponseYou've already chosen the best response.1Not yet. I'm a senior at RPI.

Aylin
 3 years ago
Best ResponseYou've already chosen the best response.1But next year I hope to be a teacher.

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0so your graduating next year ?

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0how many years did you spend in RPI ?

Aylin
 3 years ago
Best ResponseYou've already chosen the best response.1The end of this year will make three years.

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0that's really quick wow

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0is this it ? "Rensselaer Polytechnic Institute" ?

Aylin
 3 years ago
Best ResponseYou've already chosen the best response.1Yeah. Not really very fast though; I spent two years at another school first.

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0I see, still not bad. I had a friend who spends 3 years at community college and transfer

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0what's the GPA for acceptance in RPI?

Aylin
 3 years ago
Best ResponseYou've already chosen the best response.1It was a community college that I came from, actually. From another college or from high school?

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0yeah, everybody is doing community college first now aday, cuz it's so much cheaper :D

Aylin
 3 years ago
Best ResponseYou've already chosen the best response.1Minimum is 3.0 Higher is better of course, but they also like it if you've been taking mostly science and math courses (or engineering if that's your major choice) if possible.

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0well thanks so much for talking with me Aylin. I gotta get to dinner now :D

Aylin
 3 years ago
Best ResponseYou've already chosen the best response.1Like if you took a lot of math/science courses and made mostly Bs, it would look better than if you had made As taking mostly things like Art or Chorus or History

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0anything with science and math is better...and it's the subjects that im most terrible at. WOW..

Aylin
 3 years ago
Best ResponseYou've already chosen the best response.1Well, the other thing is that RPI is about $60000 a year right now, so...

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0your kidding me? no way

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0so how much for 1 semester of full time?

Aylin
 3 years ago
Best ResponseYou've already chosen the best response.1About half, but it depends on what your dining plan is, where you live, ect.

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0omg so much debts...well but it's COLLEGE that we're talking about here so no suprise.. :

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0one time I read that article about this college couples graduated with over 200k debts scared the hell out of me :

Aylin
 3 years ago
Best ResponseYou've already chosen the best response.1I'm gonna have about $45K.

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0did they tell you about the rate? or how much you have to pay back once your graduated ? I mean monthly?

Aylin
 3 years ago
Best ResponseYou've already chosen the best response.1At some point probably. I don't remember what it is right now.

Shido88
 3 years ago
Best ResponseYou've already chosen the best response.0oh i see, well i hope you can pay back all the debts without too much trouble :
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