Show that the function u(x,y)=e^x cos(y) is harmonic in the x-y plane

FX DAILY：Trive 看涨美元/日元

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PAI F4 KERAJAAN ABBASIYAH

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FX DAILY：Trive 看跌欧元/美元

Trive 创汇

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SAINS F4 BAB 8 BAHAN DAN UNSUR

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ENGLISH F4 GAPPED TEXT

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MATEMATIK F4 BAB 3 PENAAKULAN LOGIK

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ADD MATH F4 BAB 8 VEKTOR

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SAINS F4 BAB 5 GENETIK

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SAINSS F4 ULANGKAJI

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Let f(x) be a polynomial of degree 1. If f(10)-f(5)=15, then f(20)-f(5)=?

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A box contains 8 blue & 6 red socks. What is the number of ways that 2 socks can be drawn ...

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Alternate way: Find 1+2+3+... +(n-1)+n via "polynomial degree 2"

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alternate way: count sum 1 + 2 + 3+... + n via "polynomial"

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Pantun Melayu [Buah cempedak di luar pagar]

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U North Texas Integration Bee 2nd way: x^2/√(x-1) dx

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1st way: exp ∫(e^x)/x (1+x log(x)) dx

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AI 2008 Hindustan: Evaluate integral ∫ 2/3 cos(x)/sin^2(x) dx

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2nd way: integral ∫ log √x(x^n) dx

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MP 8,93,96,97,99 Hindustan: Evaluate ∫ sec(x)/(sec(x)-tan(x)) dx

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prob stat: Let J & K be independent events. P(J|K)=0.3. Find P(J)

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