Member since September 12, 2011

sonpham

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sonpham
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My Recent Posts
 
Thu 13 Sep, 2012 10:29 pm - an infinite group that has exactly two elements with order 4 (view)
Fri 20 Apr, 2012 12:24 pm - A wire of radius one meter is centered on the origin in the xy plane. This wire carries a total charge of +Q. Another wire of length two meters runs along the z-axis and is centered at the origin.... (view)
Sun 15 Apr, 2012 06:27 pm - A planet of mass m moves in a circular orbit around a star of mass M. The gravitational potential is given by V(r) =-GMm/R^n. Find all values of n that lead to a stable orbit and show why. (view)
Wed 28 Mar, 2012 09:49 am - given : J(n)=b*A(n) a=0.7 A(0)=70% S(n+1)=j*J(n) j=0.75 J(0)=75% A(n+1)=s*S(n) +... (view)
Sun 18 Mar, 2012 06:29 pm - a system consists of n distinct particles, each of which can have an energy equal to kE0 for k=0,1,2,.... if the total energy of the system is ME0 , where M is a positive integer, in how many ways... (view)
Mon 30 Jan, 2012 04:27 pm - Solve the fourth order nonhomogenous linear differential equation y^(4)( x)=c for 0<x<α subject to the initial conditions: y(0)= 0, y''(0)= 0, y(α)= 0,... (view)
Sun 20 Nov, 2011 11:52 am - 1/The relation T on R (real numbers) is given by xTy iff x−y ∈ Q (rational numbers). Prove that T is an equivalence relation and find the equivalence class of 0 and √3. 2/ Let A... (view)
Mon 14 Nov, 2011 08:49 pm - Let X1, . . . , Xn be a random sample from an exponential distribution with the density function f (x|θ) = θ exp(−θx). Derive a likelihood ratio test of H0 : θ =... (view)
Thu 3 Nov, 2011 10:01 am - a random variable X has pdf f(x)=(3/2)e^-|3x| -∞ < x < ∞ a. find the mean and variance of X b. use the chebyshev inequality to find a number P(|X-μx>α)=.01... (view)
Mon 17 Oct, 2011 07:34 pm - if T follows a t7 distribution, find t0 such that P(|T|<t0)=.9 and P(|T|>t0)= .05 (view)
 
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