Andiio's SM Questions Thread

[m@tty]

What do you mean?

If I am understanding you correctly then you are asking about end points of a line?

You can have restrictions on any of the rays/lines/circles/ellipses.

For example, with:



You'll get a hole at

Or you could have


top half of a circle.

There is absolutely no reason why you can't have restrictions/endpoints in the complex plane.

And yeah, the endpoint of a ray is always an open circle (a ray of length zero has no direction).

[Andiio]

Could someone please help me with this vector Q?

Q: OAB is a triangle. OL, AM and BN are the medians.
a) Show that OG = 2/3 OL and AG = 2/3 AM
b) Hence show that BG = 2/3 BN

[moekamo]

I'm pretty sure thats a result from that comes up in the 'medians of a triangle are concurrent' proof, which i found here:

http://vce.atarnotes.com/forum/index.php/topic,6818.msg82777/topicseen.html

[Andiio]

Thanks!

Got another question: could someone please explain how to do this?

Find the minimum value of f(x) when f(x) is a^2tan^2(x) - a[tan(x)] + b, where a, b are non-zero constants.

Thanks!

[TrueTears]

Hint let u = tanx

[Andiio]

Also, just a simple implied domain question.

Why is the implied domain of y = sin^-1(x^2) equal to [-1, 1]?

I tried to use composite functions to explain it but am not really sure.

Thanks!

NVM: Worked it out a second after I posted.