VCAA 08 q9c

[lacoste]

Do we actually have to find what x is?

[nala]

We're required to find the value of x which gives the minimum, however we're not required to find this minimum. That's how I understand it.

[lacoste]

We're required to find the value of x which gives the minimum, however we're not required to find this minimum. That's how I understand it.

what the hell does that mean, finding the minimum but not the minimum ? :S

when you did it did you get 4000^1/3 by hand ?

cheers

[nala]

The x-value that you find (and I did get the same answer as you), when substituted back into the SA equation from part b, will give the minimum SA, but we don't need to do this. The x-value is the length on the triangle edges.

is that making any sense? lol

[lacoste]

so what is the actual answer to c?

[nala]

The value of x is 4000^(1/3).

[lacoste]

The value of x is 4000^(1/3).

yeh thanks, can you show me the working out on how to get this?

im stuck on that so i used the calc lol

[lacoste]

gooooooot it nvm cheers ~!!!!!!!!!!111