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mathcalculus
 2 years ago
mathcalculus
HELP: Determine the values of where the tangent line is horizontal for the function:
mathcalculus
 2 years ago
mathcalculus HELP: Determine the values of where the tangent line is horizontal for the function:

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mathcalculus
 2 years ago
Best ResponseYou've already chosen the best response.0i know i have to find the derivative and set it to zero but it's not coming out to be correct. can anyone help me

mathcalculus
 2 years ago
Best ResponseYou've already chosen the best response.0so i did 3x^26x4=0

mathcalculus
 2 years ago
Best ResponseYou've already chosen the best response.0i tried to use the quadratic formula and got sqrt(21)+3/3

mathcalculus
 2 years ago
Best ResponseYou've already chosen the best response.0+ or  sqrt(21)+3/3

mathcalculus
 2 years ago
Best ResponseYou've already chosen the best response.0also aka 2.52753...

dumbcow
 2 years ago
Best ResponseYou've already chosen the best response.1derivative seems correct

mathcalculus
 2 years ago
Best ResponseYou've already chosen the best response.0to find what x = to... ?

mathcalculus
 2 years ago
Best ResponseYou've already chosen the best response.0i used quadratic formula

mathcalculus
 2 years ago
Best ResponseYou've already chosen the best response.0@dumbcow dont i have to do that to find x??

mathcalculus
 2 years ago
Best ResponseYou've already chosen the best response.0im getting it wrong,

dumbcow
 2 years ago
Best ResponseYou've already chosen the best response.1yes everything looks correct to me...do they want exact or decimal answer?

mathcalculus
 2 years ago
Best ResponseYou've already chosen the best response.0can i use quadratic formula for ths one?

mathcalculus
 2 years ago
Best ResponseYou've already chosen the best response.0????????????????????????

dumbcow
 2 years ago
Best ResponseYou've already chosen the best response.1yes of course you use quadratic formula...thats how you got your answer that i said looked correct

mathcalculus
 2 years ago
Best ResponseYou've already chosen the best response.0im not getting that using quadratic formula

mathcalculus
 2 years ago
Best ResponseYou've already chosen the best response.0im getting something totally different and wrong

dumbcow
 2 years ago
Best ResponseYou've already chosen the best response.1\[x = \frac{3 \pm \sqrt{21}}{3}\]

mathcalculus
 2 years ago
Best ResponseYou've already chosen the best response.0yes! but from 6+2*sqrt(21)/6?

mathcalculus
 2 years ago
Best ResponseYou've already chosen the best response.0shouldnt it be 1+ or  sqrt 21/3

dumbcow
 2 years ago
Best ResponseYou've already chosen the best response.1same thing, just a matter of splitting up fraction or keeping it as single fraction

mathcalculus
 2 years ago
Best ResponseYou've already chosen the best response.0no it's not because the answer is 1+ sqrt (7/3) gives me 2.52753 and 1+sqrt 21/3 gives me 1.86086!

dumbcow
 2 years ago
Best ResponseYou've already chosen the best response.1hmm \[\frac{\sqrt{7}}{\sqrt{3}} = \frac{\sqrt{21}}{3} \]

mathcalculus
 2 years ago
Best ResponseYou've already chosen the best response.0try it on a calculator.

dumbcow
 2 years ago
Best ResponseYou've already chosen the best response.1http://www.wolframalpha.com/input/?i=1%2Bsqrt%287%2F3%29+%2C+1%2Bsqrt%2821%29%2F3

dumbcow
 2 years ago
Best ResponseYou've already chosen the best response.1oh you added the "1" before dividing by "3"

mathcalculus
 2 years ago
Best ResponseYou've already chosen the best response.0okay from my answer.... not the internet.. 6+2 sort(21)/3.... where do i go from there?

dumbcow
 2 years ago
Best ResponseYou've already chosen the best response.1well it should be a 6 on bottom

mathcalculus
 2 years ago
Best ResponseYou've already chosen the best response.0no i didn't add anything.

mathcalculus
 2 years ago
Best ResponseYou've already chosen the best response.0okay sure a 6. i thought it could be a 3 to narrow it down

mathcalculus
 2 years ago
Best ResponseYou've already chosen the best response.0so 6+or2sqrt(21)/6

dumbcow
 2 years ago
Best ResponseYou've already chosen the best response.1i dont see the problem, you posted answer in beginning... " i tried to use the quadratic formula and got sqrt(21)+3/3 "

mathcalculus
 2 years ago
Best ResponseYou've already chosen the best response.0so it is a 3 in the denominator!

dumbcow
 2 years ago
Best ResponseYou've already chosen the best response.1\[\frac{6 \pm 2\sqrt{21}}{6} = \frac{2(3 \pm \sqrt{21})}{6} = \frac{3 \pm \sqrt{21}}{3}\]
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