# Recent content by iNCREDiBLE

1. ### Asteroids momentum

An asteroid is spotted moving directly toward the center of Starbase Alpha. The frightened residents fire a missile at the asteriod, which breaks it into two chunks, one with 2.4 times the mass of the other. The chunks both pass the starbase at the same time. If the lighter chunk passes 1800 m...
2. ### Ideals in the ring Q[X]

Consider the ideal I of Q[x] generated by the two polynomials f = x^2+1 and g=x^6+x^3+x+1 a) find h in Q[x] such that I=<h> b) find two polynomials s, t in Q[x] such that h=sf+tg
3. ### Linear Algebra question: n x n determinants

Call the upper non-zero submatrix for U and the lower for L. Then the determinant is the product of their determinants, i.e det(U)det(L)
4. ### Normal Distribution

Why even use a binomial approximation? Let Y denote the number of computer chips whose lifetimes are less than 1.8*10^6. Then Y~Bin(100, 0.9082).
5. ### Parabolic cylindrical coordinates

Can someone, please, show me an example of when you are better of with parabolic cylindrical coordinates than with cartesian coordinates when computing a triple integral over a solid?
6. ### Massless particle revolving in a circle

You tell me. I have no clue what they are asking. :cry:
7. ### Massless particle revolving in a circle

Given: A massless particle revolving in a circle with a rotational velocity = (2+sin(a)) To Find: Y-axis acceleration Method #1 (from rotational acceleration) Y-axis acceleration = (2+sin(a))(cos(a))^2 Method #2 (from Y-axis velocity) Y-axis acceleration =...
8. ### Confused on finding Eigenvalues and Eigenvectors

See http://mathworld.wolfram.com/CharacteristicEquation.html" [Broken].
9. ### Limit of Trig Function

scorpa, don't be so harsh on yourself. :wink:
10. ### Limit of Trig Function

\cos \left( {2x} \right) = \cos ^2 x - \sin ^2 x = (cos x - sin x)(cos x + sin x) does it ring a bell now? You have to do something with the numerator.
11. ### Partial integration help

How I started first? I tried with partial integration in many different ways.. :bugeye:
12. ### Partial integration help

How do I integrate: [tex]\frac{xarctan(x)}{(1+x^2)^2}[/itex]

Error vv
14. ### Calculating intercept with x-axis

Use the http://mathworld.wolfram.com/Mean-ValueTheorem.html" [Broken] on a)
15. ### I hate it when people prounce ln as lawn

http://www.answers.com/Cauchy" [Broken] (scroll down a bit)