JingleBells
 Name:
 Jingyi Yang
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 Self study preparing for Alevel Double Maths & Econ in Singapore
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 3
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 Questions Asked
 19
 Questions Answered
 13
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 3

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Questions Asked

JingleBells:
Group Title
Curve Sketching: for any f(x) if as x rightarrow pm infty, f'(x) rightarrow c, a constant, does that mean that it has an asymptote? f'(x) ri…
 updated one year ago
 1 reply
 No Medals Yet
Mathematics

JingleBells:
Group Title
In PSet 2A, does anyone know what the numbers in parenthesis refers to? e.g. 2A1....by using (2)...; 2A8 ...(either use (13), or...); 2A1…
 updated one year ago
 1 reply
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Mathematics

JingleBells:
Group Title
PSet 2A8 (Quadratic Approx. 1/(1x) near x=1/2)
I keep getting f(x)~=2+4(x1/2)+16(x1/2)^2 since f"(x) at x=1/2 is 2(11/2)^(3)=16 inst…
 updated one year ago
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Mathematics

JingleBells:
Group Title
Hello everyone: Problem Set 2 (Unit 2. Applications of Differentiation, 2A6)
I can do it using the basic approximation formulas, i.e. f(x)…
 updated one year ago
 2 replies
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Mathematics

JingleBells:
Group Title
Hi everyone, I'm doing Problems Set for revision in section 1D on limits and discontinuity 1D3 a) (x2)/(x^24) is not simplified for the p…
 updated one year ago
 3 replies
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Mathematics

JingleBells:
Group Title
Real Interest Rate r=iinflation i.e. i=r+inflation so does that mean theoretically there will be negative i when deflation is larger than r…
 updated one year ago
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Mathematics

JingleBells:
Group Title
Lecture 23 is a great one for Halloween!
 updated 2 years ago
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Mathematics

JingleBells:
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Has anyone watched Pro.Strang's Highlights of Calculus? In the video lecture on Growth Rates and Log Graphs he put down x! Does that mean th…
 updated 2 years ago
 2 replies
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Mathematics

JingleBells:
Group Title
Problem Set 1, 1H3 (c), Can someone help me with this? The solution y=[e^x+(e^x^2+4x^x)^1/2]/2
Is there a straight forward way to deduce…
 updated 2 years ago
 6 replies
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Mathematics

JingleBells:
Group Title
In video lecture 05 Budget Constraint around 29'30" did the Prof make a mistake in MRS mixing up the values of Pizzas and Movies at point A …
 updated 2 years ago
 2 replies
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Mathematics

JingleBells:
Group Title
Just been doing Problem Set 1: Found a great way to think of the continuity/discontinuity of a function,j ust think of time: the only real l…
 updated 2 years ago
 2 replies
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Mathematics

JingleBells:
Group Title
Problem Set 1: 1D10
Show that
 updated 2 years ago
 5 replies
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Mathematics

JingleBells:
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Problem Set 1A9 c) the answer only gave examples of g(x) at x=0,4,8 but any other value beyond these points don't fall on the graph at all.…
 updated 2 years ago
 4 replies
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Mathematics

JingleBells:
Group Title
The graph of the function y=e^(x^2/2) isn't the same as the graph of the function y=e^(x) is it because that the first expression wants a …
 updated 2 years ago
 10 replies
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Mathematics

JingleBells:
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'The line touched because of this darn finite chalk...'
 updated 2 years ago
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Mathematics

JingleBells:
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Binomial theorem at long last pays off!
 updated 2 years ago
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Mathematics

JingleBells:
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delta y/delta x= short/short
dy/dx= darn short/darn short
I quote from Prof Strang! :)
 updated 2 years ago
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Mathematics

JingleBells:
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Hi guys! Check out Prof. Gilbert Strang's new Calculus Highlights Videos! MIT OCW
 updated 2 years ago
 9 replies
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Mathematics

JingleBells:
Group Title
In Video lecture 05 round about 37' where Pr. Jerison draws the f(x)=tan(x) and f(x)=arctan(x) the two curve crosses where if I plug in real…
 updated 2 years ago
 11 replies
 1 Medal
Mathematics

JingleBells:
Group Title
Hiya, anyone else here using these videos to prepare for CIE Alevels?
 updated 2 years ago
 10 replies
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Mathematics

JingleBells:
Group Title
In the video lecture 02 between 24'~26' the function at fist didn't include x=0; then can we still take the limit of x to 0+ and 0? Doesn't…
 updated 2 years ago
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Mathematics

JingleBells:
Group Title
Hi I just discovered the Mathlets! Uber useful, I'd been dying to find something like that: a picture is worth a thousand words, right?
 updated 2 years ago
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Mathematics

JingleBells:
Group Title
I'm using this to help self prepare Alevels in Singapore, anyone in Singapore with similar interest willing to meet?
…
 updated 2 years ago
 1 reply
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Mathematics