Recent content by discy

Homework Statement 4. Give a c > 0 and an integer n0 ≥ 1 such that, for all n ≥ n0. b. 16n log (n²) ≤ cn² The answer (from the sheet) is c = 32 Homework Equations ..The Attempt at a Solution When I attempt to solve such an equation I start at n=1, then go to n=2. but that way I get the...

is my question not clear enough?:( The exam is tomorrow (tuesday).

Homework Statement In a population of children 60% are vaccinated against the 'waterpokken'. The probablilities of contracting 'waterpokking' are 1/1000 if the child is vaccinated and 1/100 if not. a: Find the probability that a child selected at random will contract 'waterpokken'. Homework...

Would you also like to give an answer to my last question? 3. How can you be sure that the points you choose won't result in vectors that are linearly dependent? Attempt: Because a plane is non-collinear; if the points on the plane aren't on the same line, the vectors formed by those points are...

Thanks so much! For the record: I made some miscalculations. I've fixed them in my first post :).

Hi, thanks very much! It's much more clear now! Three more questions and my attempt: 1. What is the key to create three points on different lines? Attempt: I suppose make sure that the combination should not be a scalar multiply of the other points?. So point R could be (3, 6, 5\frac{2}{3})...

Homework Statement How to convert an implicit representation to a parametric Homework Equations Implicit: ax + by + cz = d. Parametric: (x,y,z) = (xp, yp, zp) + s(xv,yv,zv,) + t(xw,yw,wz)The Attempt at a Solution For parametric to implicit it would look like this: (x,y,z) = (0, 7, 6)T + s(-8...

Ow yeah. I'm being stupid. And if two vectors are parallel? then the angle is, I suppose 180 degrees? What equation would I need to solve in that case? (i'm sorry, my teacher is very unclear about these things, he puts questions on his sheets but doesn't always give the answers during class)...

ok. so let me reform: (21-3k) / √(17+k²) * √35 = 0 \frac{21-3k}{\sqrt{17+k²} * \sqrt{35}} = 0 what would be the easiest way to get to k = 7? (when I put 7 as k I get zero, so the equation is correct)

Homework Statement Vectors find k if (4,1,k)τ & (5,1,-3)τ are perpendicular? From the answer sheet I know the answer is k = 7 Homework Equations I believe I need these two but I'm not certain: Dot-product: v*w = v1w1 + v2w2 + ... vdwd cos θ = v*w / ||v|| * ||w|| The Attempt at...

/close

hm okay. like x^-3. got it. I guess I should learn this formula, not only because it's a "familiar" one for you guys. But also because for some reason it's not on my formula sheet. :) tnx for your help.

thanks for your answer. now how would I put 1/x³ into that formula to get -0.5 * x^-2 ?

how to compute the ANTI derivative of 1 / x^3 I think I need the formula: f(x) = 1/x^n than f'(x) = -n/x^n+1 but I'm not sure and don't know how to use it. I know the answer is: -0.5 * x^-2 but have no idea why. could someone explain this to me please?