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sum count sigma Show a Σbk = Σabk where k=1 to n

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There are 2 lines. One line has 3 points & the other line has 6 points.
3:11

There are 2 lines. One line has 3 points & the other line has 6 points.

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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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count quick review: Permutation vs Combination
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count quick review: Permutation vs Combination

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2nd/3ways: trig integral ∫sec(x) dx
1:46

2nd/3ways: trig integral ∫sec(x) dx

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

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Penn. State U: Suppose the p.m.f of discrete random variable X is ...
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Penn. State U: Suppose the p.m.f of discrete random variable X is ...

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2 ways: integral ∫(x-a)/(x+a) dx
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2 ways: integral ∫(x-a)/(x+a) dx

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cutie version of Umaro chan 😫
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cutie version of Umaro chan 😫

LeghnziiLeghnzii

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I actually gave birth to a person
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I actually gave birth to a person

qinyibabyqinyibaby

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Tensura tensei I'm not bad slime yo !
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Tensura tensei I'm not bad slime yo !

chelseuchelseu

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logic: De Morgan's Law
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logic: De Morgan's Law

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2nd/2ways: count perm Show P(n,2)+P(n,1)=n^2
5:35

2nd/2ways: count perm Show P(n,2)+P(n,1)=n^2

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2nd way: trig integral ∫sin(x/a) dx
1:18

2nd way: trig integral ∫sin(x/a) dx

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3 ways: ∫ (3x+11)/(x^2-x-6) dx
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3 ways: ∫ (3x+11)/(x^2-x-6) dx

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2nd/2ways: r-Permutations
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2nd/2ways: r-Permutations

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trig integrals ∫cot(ax+b) dx vs ∫cot^2(ax+b) dx
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trig integrals ∫cot(ax+b) dx vs ∫cot^2(ax+b) dx

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1st/2ways: permutation Show P(n,2)+P(n,1)=n^2
4:37

1st/2ways: permutation Show P(n,2)+P(n,1)=n^2

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examples: 2x2 matrix which is its own inverse
3:58

examples: 2x2 matrix which is its own inverse

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2 ways: derivative a^f(g(x))
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2 ways: derivative a^f(g(x))

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2 ways: Σ 1? where k=m to n
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2 ways: Σ 1? where k=m to n

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Laman utama>sum count sigma Show a Σbk = Σabk where k=1 to n>