Recent content by hopelesss

thanks for your reply. 1) I had to turn up topology in the book's index and its chapter 10. We did not have that chapter yet. 2) yes we learned about the mean value theorem a few weeks ago. i see in my notebook in did many examples using this theorem. But it was more like ''show that sin x <x...

A function f is called restricted ( "bounded") on an interval I if there is a constant K such that | f (x) | ≤ K for all x ∈ I. (1) Let f be a differentiable function on a closed interval [x1, x2], where x1 and x2 are real numbers such that x1 < x2. Justify that f then is limited. (2) Let f be a...

I see i have much studying to do :) thanks for all help, i will now know what to do if i get tasks like this again :)

so when i plot (0,1) and (1,2) into x^3-3x+1 i get f(0)=1 and f(1)=-1 f(1)=-1 and f(2)=3 so i now know i have one root in each interval? what do this mean for my task?

thanks for responding to my post yes i think i know how to factor a cubic. i use polynomial factoring and get x^3-2x+1=(x-1)(x^2+x-1). But i see MarkFL takes g(x)-y, then takes f'(x) before he factorise and i did not do that so then its wrong. :) I don't understand how i can know f has the...

Explain why the graph of the function g (x) = x^3 - 2x + 1 intersects the line y = x in each of the intervals (-2, -1), (0, 1) and (1, 2). i hope someone can help me with this. To be honest i do not even know where to start. i sketched g(x) and y=x and i don't see them intersect in the...

confused, taskes says ''Based on this information, what is the thickness of the upper layer?''

sorry was supposed to be km. http://postimg.org/image/ro5r3rafd/ i calculated the oppositeside.

can i do this ic= sin^-1 3/5 = 36,8 tan 36,8 = (7,5/2)/b = 0,75*3,75 = 2,8 And say upper layer is 2,8meters?

I only find seismic refraction when i google that. I still don't get it. i would still miss the T0 if i use that equation. And the critical distance and critical time info would not have been used

It only say ''two-layer case with horizontal interface'' and the intercept time is given by ... and solving for refractor depth. And i can't find any equation with xcrit in it. tryed to google it but did not find any equation with Xcrit in it.

My task is Let's consider a model made up of two horizontal layers: the upper layer has a velocity Vp1=3.0 km/s and the lower layer (or half space) has a velocity Vp2= 5.0 km/s. Aseismic experiment is conducted at the surface and showsthat the P wave refracted in the lower layer has a...

HAHAHAHA :D no clue what I've been doing. thx!

I do know abit polynomial division, but i can't see my teacher using this method. I did mean (x3 - 3x + 2)/(x - 1). Im used to doing it like this lim x-> 3 (x-3) / (x3 -9) = lim -> 3 (x-3) / ((x-3)(x+3)) = 1/(3+3) = 1/6 But when i try do this i can't get it right, and i can't cancel the...

Homework Statement Hey guys im trying to figure out what lim x->1 ((x^3)-3x+2) / x-1 is. I get -1/0 and then when i try factor it i can't get it right.. Homework Equations ? The Attempt at a Solution lim x->1 x^3-3x+2 / x-1 = lim x->1 1^3-3*1+2 / 1-1 = -1/0