Recent content by chesshaha

There's no shortcut...

Homework Statement find the max and min of f(x,y)=x^2y, constraint x^2+y^2=1 Homework Equations None. The Attempt at a Solution I found that possible points use the procedure of the method of lagrange multiplier, I got (\pm\sqrt{2/3}, \pm\sqrt{1/3} so 4 points total. But do I have to...

o yea, thanks.

Thank you very much, this helps alot. So the series converge, the sum is either 0 or -2, depends if it's even or odd, right?

Thanks for your help. But I still don't understand how can did u rewrite the series... to this \sum_{n=1}^{\infty}2(-1)^{n} Sorry, I am a bit of slow, Please Explain more, Thank You!

I got the series diverge, because the 2 cancels and it left with \sum_{n=1}^{\infty}(-1)^{n} is it right? thx for ur help

thx, that helps alot, so the alternating series? Can u factor out the 2? r u sure that can be done?i don't understand

I don't know where to start, I didn't know what test to use? Can u give me a hint of which test to use?

the about x=1 is what mess me up. i meant to spuare all the R's but forgot, because this is hard to see. integral of pie[(1-y)^2-(1-y^(1/2))^2]dy from 0 to 1. this is right now? I got pi/6, it looks right, but is it?

Homework Statement series converge? DL the img, sry, can't type it. http://www.geocities.com/chessobeyer/math.bmp what's the sum if converge? Homework Equations none. The Attempt at a Solution alternating series, but it's (-2)

Homework Statement Find the volume of the soild formed. The region bounded by the line y=x, and the curve y=x^2. about the line x=1 Homework Equations Either Washer or Shell The Attempt at a Solution I want to use washer, but have to switch to dy. I want to use shell, but don't...

You basicly just re-stated my question, thanks...

I don't have a homework problem, and this is not a homework question, read my post please. Im asking where did the net work, 1200J went? Did it store in the object?

Work and Energy Question?? PLZ Help! Hi, I am having a stupid question with a classic work and engergy problem. Suppose you have A 50-kg crate is pulled 40m along a horizontal floor by a constant force exerted by a person, F done of by the pulling force is 100N, which at 37...