Recent content by dopey9

square root limit proof R is the real nmbers so let A be in R let f: A -> R be such that f(x)>0 for all x in A c is in A Does anyone know the proof to or even get me started on this proof shown below [It's hard to write roots on the computer, so I will use the 1/2-th power instead.]...

Homework Statement i just want to know what the modulus of the speed (u) would if Homework Equations u = (-2/r)[SIZE="4"]e[SIZE="1"]r + (2/r)[SIZE="4"]e[SIZE="1"]theta The thing is i get confused with the [SIZE="4"]e[SIZE="1"]r and [SIZE="4"]e[SIZE="1"]theta ..do these just mean the...

Thanks ...Thankz

Let x[SIZE="1"]1, . . . , x[SIZE="1"]k be feasible solutions of the linear programming problem: Maximize z = (c^t)*x subject to Ax < = b and x >= 0, so for i= 1, . . . , k, Ax[SIZE="1"]i <=b and x[SIZE="1"]i >=0, Let v be any convex linear combination of x[SIZE="1"]1, . . . ...

streamline question i was wondering if my u is right, as my problem deals with two dimensional inviscid steady potential flow and there are are various ways to find u = u(r,theta)e[SIZE="1"]r + v(r,theta)e[SIZE="1"]theta u= (-2/r)*e[SIZE="1"]r +(2/r)*e[SIZE="1"]theta and if so i was...

Thanks that makes sense..i got it in my notes but just don't when to apply it

Homework Statement Iv been given the complex potential equation ..iv been trying to split it into real and imaginary parts so i can find the streamfunction and potential for it...however the ln is making it difficult Homework Equations The Attempt at a Solution iv tried...

Can someone help me with this proof

i have the ode dx/dt = x^4 +4(x^3) - 60(x^2) generally the solution s x(t) satisfy x(0) = x[0] and i found out that the attactor is -10 repellor is 6 and 0 is niether however i want to describe the asymptotic behaviour of the solution satisfying x(0) = 1/2 , which is were i...

A function f : A ->R is increasing if f(x) <= f(y) for every x, y in A such that x <= y. Suppose that f : [a, b] -> R is increasing and that a < c < b. i want to shat that : lim f(x) = sup{f(x) | a <= x < c} and x->c- limf(x) = inf{f(x) | c < x <= b}. x->c+ and whether these...

Dont worry about it ...iv left it out..thankz for help...but if u do want the full question ...the first one i posted...and the last one i jus posted ...and that's all i was given..there was no diagram thankz anyway

... but this is what i have taken from a past paper...it says "the couple of the total force about the point with position vector i is zero" ...its confusing me too...thankz for the help tho

can i just confirm that are these parts right that i answered before...because i wasnt too show whether a negitive sign is requied with the 10 coz of the direction?: "Iv found the co-ordinates of Q relative to P at t=0 ---->X=(10,10)km iv also found the velocity of Q relative to P----> V=...

A ship P is traveling due East at 30 km/h and a Ship Q is traveling due South at 40 km/h. Both ships keep constant speed and course. At t=0 they are each 10 km from the point of intersection of their courses and moving towards the point. Iv found the co-ordinates of Q relative to P at...

Forces/couple! particle of mass m kilograms is acted on by two forces F[1] and F[2] with magnitudes 3*sqr-root 5 Newtons and sqr-root 5 Newtons and directions parallel to the vectors i+2j and i-2j respectively. The particle is initially at a position given by the vector 2i+j i was told to...