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Mathematics 23 Online
OpenStudy (anonymous):

I'm trying to use integrals to find the arc length of y=2x-5 in the interval [-1,3]

OpenStudy (anonymous):

you are wanting to integrate along the arc, ir integrate with respect to "ds" .

OpenStudy (anonymous):

yes with respect to dx. I'm trying to use the arc length formula L= integral of (sqrt(1+(dy/dx)^2)dx)

OpenStudy (anonymous):

|dw:1342649289785:dw| because these are differentials, ds becomes: \[\sqrt(dx^2 + dy^2)\]

OpenStudy (anonymous):

oh, ok

OpenStudy (anonymous):

you already know the formula

OpenStudy (anonymous):

good

OpenStudy (anonymous):

yes, Im just having a hell of a time using it lol

OpenStudy (anonymous):

so first take the derivative of the equation

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