#integration by parts
40 messages · Page 1 of 1 (latest)
yes i already know that??
no i mean to like find the co ords
i know the basics of splitting it but finding the co ords is so off putting
the only co- ords you need is when the line meets the x axis so when y of the line you calculated = 0
like how do u find this
yes i know that omg
we don't have the equation for line l
y - e = (1/1+ln x) (x-e)
but this isn't the equation though for line l
omg yes i already know that im not fucking dumb

the point is that's not the gradient
then you differentiated wrong
the gradient is -1/2 so how are u meant to go from -1/1+lnx to -0.5
you input (e,e)
don't even try to help me if u don't know what ur doing bye

Dont have to be so rude
Sub in ur x coordinate into the gradient first then find the negative reciprocal
dy/dx=lnx+1
hence the gradient of the tangent at P(e,e) is ln(e)+1 which is 2
you know that L is a normal at c
you know the normal is perpendicular to the tangent hence the gradient of the normal is the negative reciprocal of the tangent
hence -1/2
@potent dome
yh i'm not reading that i'm doing that myself
thanks though
at least someone knows what they're doing
you do understand how you get the -1/2 tho?