Recent content by Song

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I got c1=0, and c2=0 But they're not right..

18.1 #33 Let L be a nonzero real # (a) Show that the boundary-value problem y''+vy=0, y(0)=0, y(L)=0, has only the trivial solution y=0 for the cases v=0 and v<0. I get (a), but I don't know how to do (b) (b) For the cases v>0, find the values of v for which this problem has a...

trigonometirc sub.

integral y(1+y^2)^1/2 dy can someone help me with this? Thanks.

anyone?...

I have a conjugated acid + excess base (OH-) ---><---... I don't know how to write the part on the right. Help.. Thanks.

I have a soda/water bottle design coming up. And it requires me to find the proper shape that will have the minimum surface area. Do you know where I can find the related information on this? Where can I find some comparable models and so on? Any infor. will be helpful. Thanks.

Yeah. That's right. How do you do the integral 2 to infinity lnx/x^2? Integration by parts?

But for (d) from https://www.physicsforums.com/showthread.php?t=134683 should it be conver. by the alternating series test?

I sort of get the concept...but not exactly sure. Thank you so much though.

a)con. b)div. c)con. d)div.

Thanks. But I'm not sure if I get the concept.

Thank you. Here's a question I don't understand. Suppose that sigma n=0 to the infinity Csubn*x^n converges when x=-4 and diverges when x=6. What can be said about the convergence or divergence of the following series? a) Sigma n=0 to infinity Csubn ..... Can someone give me a hint...

To StatusX, I see what you mean now. Let me re-do my problem. Thanks by the way.