Recent content by crememars

TL;DR Summary: we are given a set of coefficient matrices (shown below) and we need to determine whether they are in REF, RREF, or neither. Hello! I am having a lot of trouble identifying these matrices, and using the criteria checklist is not helping very much. Here is what I am working with...

Yes, I realized I was overcomplicating things. If I simplify (n+i)/n to (n/n +i/n) to (1+ i/n), I get f(x) = xlnx

forgot to answer ! thank you for your help @pasmith and @anuttarasammyak :) I separated the terms and got f(x)= x^2 + 1 xiR = 2i/n -> x^2 n is just the riemann sum of 1 -> +1 ∆x = 2/n xiR = a + i∆x = a + 2i/n = 2i/n so a = 0 and b = 2

Hi! I am having trouble finalizing this problem. The interval is given so we know that a = 1 and b = 2. From there you can figure out that ∆x = 1/n, xiR = 1 + i/n. Using logarithmic properties, I rearranged the expression and wrote (1 + i/n)(1/n)ln[(n + i)/n]. I can guess that the function is...

Hi! I understand that this is an expanded Riemann sum but I'm having trouble determining its original form. I don't actually have any ideas as to how to find it, but I know that once I determine the original form of the Riemann sum, I will be able to figure out the values for a, b, and f. If...

Wait, would it be correct to divide the minimum distance by the maximum time then? Ohh it makes a bit more sense now, I see how that would produce a minimum speed

addition gives the smallest value.. so I'd essentially be using the maximum values to get a minimum value for speed? that's very weird haha

Hi! I know this may seem like a silly question but I really just want to make sure I understand this correctly. I've already calculated the minimum and maximum values for time and height: t min = 0.58 s t max = 0.68 s y min = 1.98 m y max = 2.02 m To calculate the minimum average speed, would...

Hi! I'm so sorry for not responding, I was exhausted and I fell asleep. I'll try out some new equations with t and a as unknowns. Thank you!

∆x.k = v.k * ∆t = 20 * 3 = 60 ∆x.e = (v.k + v.ei)(∆t) / 2 = (20+50)(3) / 2 = 105 I'm confused, is my graph wrong? Shouldn't the ∆x of Enterprise be equal to 160 if its initial position is 0 and it's about to catch up with Klingon?

I drew a x(t) graph to try to map out what was going on. I guessed that in order to just barely avoid the crash, the velocity of Enterprise (v.e) will have to decrease to match the velocity of Klingon (v.k). So v.e final = v.k Since we're looking for the acceleration, I used this formula: vf^2...

I think I understood, thank you! so the drag would be equal to the x component of the tension.

I drew a FBD but I feel like it's wrong because there are too many missing values. I tried this: Fy = 0 Tcosθ - Fg = 0 Tcosθ = mg T = (1.2)(9.8) / cos(25) T = 12.98 N Fx = ma Fwind - Tsinθ - Fdrag = ma Fwind - (12.98)(sin25) - Fdrag = ma I don't know how to find these missing values. I feel...

tried that, and it worked, thank u ! what is that rule called though? I don't remember learning it

hi ! I'm having a lot of trouble simplifying my expression for one of my homework questions. I know someone asked about this homework problem already, but the answers didn't really help me figure out how to simplify it.. I really have no idea what steps to take, and I've even consulted all my...