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Mathematics 19 Online
OpenStudy (amistre64):

How would you define the slope of the line defined as : x=3+2t y=2-t z=1+5t

OpenStudy (anonymous):

WHAT *gasp* you are asking a question!?

OpenStudy (anonymous):

(x',y',z') this is the slope

OpenStudy (amistre64):

im trying to build my smartscore in asking :)

OpenStudy (anonymous):

lol

OpenStudy (anonymous):

slope of a tangent plane, dont know myself, good question

OpenStudy (amistre64):

not the plane itself; just the line in the plane

OpenStudy (anonymous):

(2,-1,5)

OpenStudy (amistre64):

that is not a slope, that is a vector

OpenStudy (anonymous):

it is a derivative of parametric curve

OpenStudy (amistre64):

and it is a vector of the line; it is not the slope of the line ... think more along the "lines" of directional derivatives

OpenStudy (anonymous):

if you know how to do, why are you asking

OpenStudy (anonymous):

slope in 3d.....:)

OpenStudy (amistre64):

its not a crime to propose ideas for consideration

OpenStudy (amistre64):

:) slope in 3d yes

OpenStudy (anonymous):

you got the 3 slopes in that vector. For each axis.... just pick one you like more

OpenStudy (amistre64):

thats wont give me the slope in the direction of the line tho

OpenStudy (beginnersmind):

you could look at it as z=f(x,y) and define the slope for any direction in the x,y plane as the directional derivative of f(x,y)

OpenStudy (anonymous):

what do you understand by slope?

OpenStudy (amistre64):

begin, yes, but spose we dont know how to determine a directional derivative; what would be the next best thing to define the slope of a 3d line?

OpenStudy (anonymous):

i'm thinking perhaps we can take the gradaient of the plane defined by that line

OpenStudy (anonymous):

Yout line = (3,2,1) +t(2,-1,5)

OpenStudy (amistre64):

|dw:1335219347112:dw|

OpenStudy (anonymous):

this is only x axis, you missing the other two

OpenStudy (amistre64):

|dw:1335219392546:dw|

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