Locus Problem (1 Viewer)

[ItDunMatter]

hello..

any help would be appreciated

Find the equation of the locus of a point which moves so that the sum of its distances from (0,6) and (0,9) is always 5

 

[kurt.physics]

hello..

any help would be appreciated

Find the equation of the locus of a point which moves so that the sum of its distances from (0,6) and (0,9) is always 5

Let this point be

The distance from to is:



The distance from to is:



We are given the sum of the distances are 5














Then you must solve this, i cbf.

 

[Pwnage101]

isnt that the definition of an ellipse (PS+PS'=2a)?

although thats 4U

SO when you solve what kurt.physics did it should turn out to be an elipse.

 

[kurt.physics]

Here is what the locus looks like.

 

[hermand]

isnt that the definition of an ellipse (PS+PS'=2a)?

although thats 4U

SO when you solve what kurt.physics did it should turn out to be an elipse.

yeah that's what i thought, ellipses should be 4u. i went through this massive thing and then thought i'd check if someone else had solved it and they had. haha.

 

[hermand]

kurt, can't you only do cosmology in your proper year twelve? when you're doing the rest of your non-accelerated units? i could be wrong, just wondering.

 

[lolokay]

kurt, that would be a lot less messy if you made it d₁ = 5 - d₂ ..

 

[kurt.physics]

kurt, that would be a lot less messy if you made it d₁ = 5 - d₂ ..

ah, yes it would thanks

but yet still would be an unimaginable mess of x's and y's

 

[kurt.physics]

kurt, can't you only do cosmology in your proper year twelve? when you're doing the rest of your non-accelerated units? i could be wrong, just wondering.

well cosmology might not run next year (but from what i herd most probably isn't). But there is no rule to which year you do it in, you just have to have finished a HSC subject before your final HSC. But most of the people who do it are in their final year of their HSC mainly because there are more people who accelerate by 1 year compared to those who accelerate by more than 1 year.

 

[hermand]

well cosmology might not run next year (and from what i herd most probably isn't). But there is no rule to which year you do it in, you just have to have finished a HSC subject before your final HSC. But most of the people who do it are in their final year of their HSC mainly because there are more people who accelerate by 1 year compared to those who accelerate by more than 1 year.

ah fair point. well good luck and hope it runs for you next year!

 

[kurt.physics]

ah fair point. well good luck and hope it runs for you next year!

Thanks

 

[Aquawhite]

kurt.physics is my maths hero! He will get 100 for his 2U course this year ^_^

 

[duckcowhybrid]

kurt, can't you only do cosmology in your proper year twelve? when you're doing the rest of your non-accelerated units? i could be wrong, just wondering.

If you finish an accelerated subject in Yuar 10 you can still do Distinction Courses. Quite a few people in my grade do Cosmo/Philo.

 

[Aquawhite]

I don't even know if anyone chooses Comparative Literature xD... probably far too hard!

 

[kurt.physics]

I don't even know if anyone chooses Comparative Literature xD... probably far too hard!

or far too BORING ;D