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anonymous
 one year ago
Help with a math problem?
anonymous
 one year ago
Help with a math problem?

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alekos
 one year ago
Best ResponseYou've already chosen the best response.0the tangent line occurs at the vertex of the this particular function which happens to be a parabola

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Okay so first I would have to derive my equation right?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So I would get 9x3 and then what would I do?

johnweldon1993
 one year ago
Best ResponseYou've already chosen the best response.1Well from there...you want a tangent line that is horizontal...and since a tangent line is the slope at any given point...that would mean the slope would be 0 right? So if we have the derivative of the function...we need to find where the derivative = 0

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So it would be 3 at 0

johnweldon1993
 one year ago
Best ResponseYou've already chosen the best response.1No I mean we have the derivative...and we want the derivative to equal 0 \[\large 9x  3 = 0\] solve for 'x' :)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Oh my bad to it would be 3/9.

johnweldon1993
 one year ago
Best ResponseYou've already chosen the best response.1Mmhmm...or 1/3 right :P So that means that at x = 1/3 ...we will have a horizontal tangent line

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0And if I wanted to find the equation for the tangent line at 2 would i just plug in 2 into my derived equation?

johnweldon1993
 one year ago
Best ResponseYou've already chosen the best response.1But we probably should figure out where that will be in terms of 'y' now... So plug in your x = 1/3 into your original equation and solve for 'y'

johnweldon1993
 one year ago
Best ResponseYou've already chosen the best response.1Good...so just to finish up the first question At (1/3 , 1.5) there will be a horizontal tangent line

johnweldon1993
 one year ago
Best ResponseYou've already chosen the best response.1And as far as your second question...yes you would just plug in x = 2 and solve for y in your derived ezpression

johnweldon1993
 one year ago
Best ResponseYou've already chosen the best response.1Cant spell apparently >.< "expression"

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Okay thank you so much!
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