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CORE 3???

y=lnx/x
where A crosses the x axis state the coordinates of A

right when y=0 it leaves us with 0=lnx/x how do you rearrange it to find x !!!??
Original post by calster102
y=lnx/x
where A crosses the x axis state the coordinates of A

right when y=0 it leaves us with 0=lnx/x how do you rearrange it to find x !!!??


Do it how you'd do any other equation. Start by multiplying both sides by x.
Original post by calster102
y=lnx/x
where A crosses the x axis state the coordinates of A

right when y=0 it leaves us with 0=lnx/x how do you rearrange it to find x !!!??


Given any other fraction ab=0\dfrac{a}{b} = 0, what can you say?
Reply 3
Original post by Chlorophile
Do it how you'd do any other equation. Start by multiplying both sides by x.


i think iv confused myself when i thought of 0=lnx/x and multiplied it by x i wrote down x=lnx when clearly 0 multiplied by x is 0 rightt? is it just my thinking which was confusing me??????????
Original post by Chlorophile
Do it how you'd do any other equation. Start by multiplying both sides by x.


not really

you should know that fraction=0 means numerator=0
Original post by TenOfThem
not really

you should know that fraction=0 means numerator=0


Well that's basically the exact same thing?
Reply 6
Original post by Chlorophile
Well that's basically the exact same thing?


Read my latest comment above did i confuse myself in that way???
Original post by calster102
Read my latest comment above did i confuse myself in that way???


Y=ln(x)/x, let y=0
ln(x)/x=0, multiply both sides by x
ln(x)=0
At this point think about using the inverse of ln(x).

Does that help?
Reply 8
Original post by ApplyYourself
Y=ln(x)/x, let y=0
ln(x)/x=0, multiply both sides by x
ln(x)=0
At this point think about using the inverse of ln(x).

Does that help?


I get it now but did i just get my thinking wrong by bringing x so that lnx=x when clearly 0 multiplied by x is 0?
Original post by calster102
I get it now but did i just get my thinking wrong by bringing x so that lnx=x when clearly 0 multiplied by x is 0?


Yes it looks like you did.

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