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Calculus/Expert Profile

Frederick Koh

Singapore

On Vacation
returns 06/15/2012

Expertise

I can answer questions concerning calculus, complex numbers, vectors, statistics , algebra and trigonometry for the O level, A level and 1st/2nd year college math/engineering student.

Experience in the area

3 years helping out in a singaporean youth forum: http://forums.sgclub.com/math_help/ (under the moniker whitecorp) You can also visit my main maths website http://www.whitegroupmaths.com where I have designed "question locker" vaults to store tons of fully worked math problems. Peace.

Organizations

IEEE(Institute of Electrical and Electronics Engineers )

Education/Credentials

Former straight As A level student from HCJC (aka HCI); scored distinctions in both C and Further Mathematics B Eng (Hons) From The National University Of Singapore (NUS)

Average Ratings

Recent Reviews from Users

User	Date	K	C	P	Comments
Joel	04/22/12	10	10	10	Thanks for the clarity. your suggestion makes .....
Sangeeth Simon	04/08/12	10	10	10	Thank you for your time sir.
J	04/07/12	10	10	10	Extremely helpful and his quick responses were .....
Laura	02/22/12	10	10	10
humaira	01/12/12	10	8	10

Recent Answers from Frederick Koh

2012-04-23 calculus 2:

Both series would converge; for (a) when n tend to infinity, the denominator becomes infinitely large, which means that the term will converge towards zero. For (b), notice that the 3^n term in the

2012-04-21 Pre-Calculus:

The exponential decay description is an inappropriate model. The distance travelled by the ball actually follows an infinite geometric series: Total distance = 132 + 132(1/3) +132*(1/3)^2 + 132*(1/3)^3+

2012-04-12 Limited growth bus calc:

dy/dt= k(m-y) 1/(m-y)*dy/dt = k Integrating both sides wrt t, Int 1/(m-y)dy = Int k dt (Int represents the integral sign) - ln (m-y) = kt + C (where C is a constant) ln (m -y) =

2012-04-07 Calculus question:

As to how I got sin^3 x = 1/4 [ 3 sin x - sin(3x)], I am merely manipulating the answer in part (a) by making sin^ 3 x the subject: sin(3x) = 3 sin x - 4 sin^3 x 4 sin^3 x = 3 sin x - sin (3x)

2012-04-06 Partial differentiation:

You need to modify your answer. Firstly, we seek out the separate total differentials of A and B: dA= (dho A/dho x)dx + (dho A/dho y) dy ------------(1) dB= (dho B/dho x)dx + (dho B/dho y) dy ------------(2)

Calculus

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