Find an equation of the largest sphere with center (11, 19 , 12) that is contained completely in the first octant.

Need help solving... thank you!

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- Jan 21st 2011, 11:33 AMthomann061Find an equation of the largest sphere with center...
Find an equation of the largest sphere with center (11, 19 , 12) that is contained completely in the first octant.

Need help solving... thank you! - Jan 21st 2011, 11:34 AMdwsmith
- Jan 21st 2011, 11:36 AMthomann061
yes i know, i am confused about how to find the radius.

- Jan 21st 2011, 11:38 AMdwsmith
- Jan 21st 2011, 11:51 AMthomann061
yes i have graphed it. i came up with this as an answer so far: (x-11)^2 + (y-19)^2 + (z-12)^2 = 0. i dont know what you mean by if the radius is 19? i thought it would be around 2 or 4.

- Jan 21st 2011, 11:56 AMdwsmith
- Jan 21st 2011, 12:01 PMthomann061
as you can tell i am very confused... i just can't seem to understand how to solve this or think about it visually. could you show me how to solve for it?

- Jan 21st 2011, 12:03 PMdwsmith
- Jan 21st 2011, 12:09 PMthomann061
i found the center, i still cant tell how to find the radius

- Jan 21st 2011, 12:11 PMdwsmith
- Jan 21st 2011, 12:21 PMthomann061
i mean 12 from the y axis

- Jan 21st 2011, 12:26 PMdwsmith
- Jan 21st 2011, 12:26 PMthomann061
ha i mean 19 from the x axis

- Jan 21st 2011, 12:34 PMdwsmith
Here is a sphere of 8 and 19. You tell me.

http://img339.imageshack.us/img339/8969/sphereex.jpg

http://img705.imageshack.us/img705/3388/61124892.jpg - Jan 21st 2011, 12:37 PMthomann061
ohhhh okay its 11^2 for the radius :)