prof didnt quite get to root test today. hw due tomorrow in discussionFlaming_Maniac wrote:
A series must be decreasing and its limit must be zero for it to have a chance at converging - but this does not prove convergence. All you can do is prove that it is divergent if one of those conditions is not true.
Looks like you should use the root test on that one.
p.s. fuck sequences and series
Last edited by Bevo (2010-02-09 18:30:51)
dunno! like i said my TA is useless so i have no practice doing this, i just have a bit of what my prof scrobbled on the boardFlaming_Maniac wrote:
http://en.wikipedia.org/wiki/Root_test#Proof
haha what do you want from me
The key is the problem isn't just a limit, you have to see not just if the terms go to zero, but if the addition of the terms is some constant. The root test is one of the tests you use to prove that convergence.
pretty sure partial sums is of a finite number of terms? not n -> infinity
#1
O=(0,0,0), A=(4,4,2), B=(3,1,3), C=(-1-3-1), D=(2,5,4)
Find the Area of OABCD
Correct Answer: 14
#2
l: x=4t and y=2-t and z=1+t
m: x=2+t and y=2t and z=4-t
What is the distance between the two lines?
Correct Answer: 1.45
Book is of no use.. Can someone explain this to me?#3
Plane: 4x+6y+3z=12
A sphere surface with the center at (0,0,0) has a point in common with the plane. Determine the equation for the sphere surface.
Correct Answer: x^2 + y^2 + z^2 = 144/61
Last edited by Jenspm (2010-02-10 09:24:59)
Last edited by Bevo (2010-02-10 10:30:26)
It's been over a year since I've done this at uni ( tbh, loved it), but aren't those vector coordinates in 3D space.. o.O And thus you can't really find the area...Bevo wrote:
#1. Separate into triangles, find area of triangles (.5bh)
Isn't it 27N?Bevo wrote:
fook
Frictionless horizontal surface
F(1) = 20N------------->[1kg block][8kg block][4kg block]<------------F(2)= 7N
What is the magnitude of force exerted on the 8kg block by the block with mass 4kg?
I have no fooking clue! They'd all be sliding to the right with a magnitude of 13N forever, wouldn't they? I've already answered "0", "7", and "13" and none of them are right. I suck at forces in motion.
also incorrectnukchebi0 wrote:
If it is frictionless, then I'm assuming net force on the system is 13N in the positive direction. Net force =/= the internal force, though, and in this case, F(4->8) should be the direct force from 4 hitting 8 and the opposite force from 8 hitting 4. Unless my shaky knowledge of mechanics fails me, it should be 27N, as FM suggested.
Definitely not as I have no bloody cluenukchebi0 wrote:
Hmm, well it's 12:30 and I'm writing an English paper.
Why is it wrong, though? You should be able to assume what I said in the first sentence. Can you go from there?
Last edited by nukchebi0 (2010-02-15 21:55:21)
yes, 27 along with the ones I listed earlier were used as "tries" to answer the problem. I only have one left.nukchebi0 wrote:
How are you knowing certain answers are wrong if you can't know the right answer? Have you tried inputting 27 into the online problem set sheet I assume you are using?
Oh, okay. Sorry I couldn't help more. Good luck.Bevo wrote:
yes, 27 along with the ones I listed earlier were used as "tries" to answer the problem. I only have one left.nukchebi0 wrote:
How are you knowing certain answers are wrong if you can't know the right answer? Have you tried inputting 27 into the online problem set sheet I assume you are using?