Drew Christianson
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 Dec 4 answered Geometric series Dec 4 comment Geometric series So, to clarify, the sum in question is $X=\sum_{i=1}^{35} 1.05^{36-i}\left(\frac{1}{1.05}\right)^{i}$ ? Dec 1 answered Is there a way to find precision used based on margin of error in compound interest problem? Nov 26 answered Calculating credit card charges based on provided APR, balance amount and monthly payment amount? Nov 26 accepted On the Origin and Precise Definition of the Term 'Surd' Nov 26 revised Derivative I do not understand: $\ln (\ln x)$ parenthesis Nov 26 suggested approved edit on Derivative I do not understand: $\ln (\ln x)$ Nov 21 asked On the Origin and Precise Definition of the Term 'Surd' Nov 14 accepted Probability of conditional inequalities of random variables Nov 14 asked Probability of conditional inequalities of random variables Oct 24 comment How to get/approximate distance between 2 close points (given in latitude/longitude)? Ultimately though, the formulas to calculate the precise distance (assuming a spherical earth) aren't too complex, what's your resistance to using them? Oct 24 comment How to get/approximate distance between 2 close points (given in latitude/longitude)? Yes, but the scaling factor won't be constant as the distance per degree of longitude varies greatly. You could find the euclidian distance between two local points and compare against that. Oct 24 answered How to get/approximate distance between 2 close points (given in latitude/longitude)? Oct 6 awarded Scholar Oct 6 accepted A Thought on Recursive Sequences Oct 6 awarded Student Oct 6 comment A Thought on Recursive Sequences @andre those are types of sequences that I led me to this thought. Probably just jumped the gun on something later in the course, but it would be cool if that property had a name. None as far as you know? Also, what are the suitable conditions? Oct 6 asked A Thought on Recursive Sequences Oct 3 comment Velocity word problem @jordan but you should be able to see ex post when your result is that the velocity is 0 at all time t that something is wrong. Thus, you take a step back, assume that to be false, and try something else. Hopefully some of this advice helps. The last thing I'll add: stick with it. It seems hard because it is, but it's hard because it's worth it. Oct 3 comment Velocity word problem @jordan For me, the answers are: It's a point moving along a line, s(t) shows me where that point is at anytime time t. Knowing the position at every point in time means pretty much everything (velocity, acceleration, location, distance traveled, etc) follows from that. Moreover that function exists inside the logical framework of mathematics, within which I expect everything to be consistent. If I follow the rules anything that begins corresponding to reality should end corresponding to reality. Hence, you shouldn't 'know' ex ante you can't plug in h=25 before you differentiate