Recent content by crims0ned

1. Engineering Careers in materials science & engineering

I am a mechanical engineering major that has been working in the fire protection industry and going to school in the evening for about two years. My ultimate goal when I decided to go back to college was to become a licensed professional engineer as fast as possible. But last summer the...
2. Setting a tangent plane parallel to another plane-Cal III

Yeah I think I got it now, I set the gradient equal to the normal of that other plane. \nabla f \left(x_0,y_0,z_0\right)= u=<1,2,3> then I set the partials equal to that normal and I get f_x=2x_0; f_y=-1; f_z=2z_0 so... \nabla f \left<2x_0,-1,2z_0\right>=<1,2,3> then my only problem is my...
3. Derivatives& the Slope of the Graph: Inflection Point

Isn't the definition of a critical point a point on f(x) that occurs at x0 if and only if either f '(x0) is zero or the derivative doesn't exist at that point?
4. Derivatives& the Slope of the Graph: Inflection Point

You're right it shouldn't be an inflection point because the original functions tangent line doesn't at x=2, but possibly it's asking for all critical points on the second derivative? Is this some kind of online homework program?
5. Derivatives& the Slope of the Graph: Inflection Point

okay, so we have f(x)=\frac{(x^2-3)}{(x-2)} and f''(x)=\frac{2(x-2)}{(x-2)^4} Even though x=2 is a vertical asymptote it is still a critical point on the second derivative
6. Derivatives& the Slope of the Graph: Inflection Point

f(x)=(x^2-3)(x-2) is a polynomial and therefore it's domain should be all real number and this should carry on to it's derivatives as well. f(x)=(x^2-3)(x-2) = x^3-2x^2-3x+6 right? So there shouldn't be a quotient at all.
7. Derivatives& the Slope of the Graph: Inflection Point

Your function is f(x)=(x^2-3)(x-2) right? Maybe if you foil it out first before you take the derivative?
8. Setting a tangent plane parallel to another plane-Cal III

At what point on the paraboloid y=x^2+z^2 is the tangent plane parallel to the plane x+2y+3z=1 ? Tangent plane equation is... Fx(X,Y,Z,)(x-X)+Fy(X,Y,Z)(y-Y)+Fz(X,Y,Z)(z-Z)=0; for x^2+z^2-y=0 My attempt at the problem... First I found the unit normal for the plane I'm trying to...
9. Thermodynamics Conceptual Question

Maybe the rate of change in the kinetic energies of the inlets and outlet per minute or second? K.E. = \frac{1}{2}mv^2
10. Cal III S reparametrization problem

once i got to \int_{-1}^{t-1} \sqrt{u^2+1}du i trig subbed and got \int sec^3(\theta) d\theta but can i change the limits along with the variable and still solve for s ?
11. Cal III S reparametrization problem

there seems to be only an i and j component
12. Cal III S reparametrization problem

the original problem is r(t)=<cos(t)-tcos(t), sin(t)-tsin(t)> ; t=o
13. Cal III S reparametrization problem

Yes, that's it, just the magnitude of dr/dt. Are you familiar with these types of problems? Because all of the ones I've worked pier to this and everything in my calculus book always out really clean.
14. Cal III S reparametrization problem

the equation is this s= \int \sqrt{(dx/dt)^2+(dy/dt)^2+(dz/dt)^2} dt evaluated from some starting t to t
15. Cal III S reparametrization problem

we've been using s reparametrizations just as kind of random parametrization i guess. pretty much it seems to be finding the arc-length and evaluating it from some number (t sub not) to an indefinite t. And what ever we come up with we then solve for t is terms of s and substitute it back into...