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

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Nhận Thua

3:36

bili_1990039280

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cách vẽ tóc

0:36

cách vẽ tóc

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cách upload hình

1:13

cách upload hình

Đức Anh Đặng_1771

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

1:11

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 ...

1:23

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"

5:18

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"

8:49

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

4 Lượt xem

Pantun Melayu [Buah cempedak di luar pagar]

0:28

Pantun Melayu [Buah cempedak di luar pagar]

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

2:02

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

1:49

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

0:56

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

1:00

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

1:23

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)

0:37

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

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Let E & F be mutually exclusive events.

0:54

Let E & F be mutually exclusive events.

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#1 2024 MIT Integration Bee Qualifying Exam

0:49

#1 2024 MIT Integration Bee Qualifying Exam

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2nd/3ways: derivative (x+1)^(1/2) (x+2)^(1/3) (x+3)^(1/4) (x+4)^(1/5) (x+5)^(1/6)

4:12

2nd/3ways: derivative (x+1)^(1/2) (x+2)^(1/3) (x+3)^(1/4) (x+4)^(1/5) (x+5)^(1/6)

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prob stat: A die with 4 red faces & 2 green faces is rolled twice.

3:54

prob stat: A die with 4 red faces & 2 green faces is rolled twice.

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The Maclaurin series of an EVEN function includes only EVEN powers.

1:58

The Maclaurin series of an EVEN function includes only EVEN powers.

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GPT4: A tweet snippet from Michal Kosinski

1:56

GPT4: A tweet snippet from Michal Kosinski

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