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

24 ViewsJul 31, 2023

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MPPET 1996 Hindustan: trig integral ∫ sin^2(x) -cos^2(x)/(sin^2(x) cos^2(x)) dx
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MPPET 1996 Hindustan: trig integral ∫ sin^2(x) -cos^2(x)/(sin^2(x) cos^2(x)) dx

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2010 Raytheon MATHCOUNTS National Competition

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Pantun Melayu [Buah cempedak di luar pagar]

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Pantun Melayu [Sorong papan tarik papan]

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

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1st/2ways: Find the sum 1/7, 10/21, 17/21, 24/21, 31/21 via median.
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1st/2ways: Find the sum 1/7, 10/21, 17/21, 24/21, 31/21 via median.

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lim x/e^x? as x→∞
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lim x/e^x? as x→∞

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2nd way: integral ∫1/cos(ax/2) dx
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2nd way: integral ∫1/cos(ax/2) dx

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2nd/2 ways: MIT Integration Bee
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2nd/2 ways: MIT Integration Bee

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2nd/2 ways: MIT Integration Bee Final
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2nd/2 ways: MIT Integration Bee Final

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1st/3part: Maclaurin Series [ahp kia]
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1st/3part: Maclaurin Series [ahp kia]

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Review: trig sin(x+90)= cos(x) & cos(x+90)=-sin(x)
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Review: trig sin(x+90)= cos(x) & cos(x+90)=-sin(x)

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4th/4ways: trig derivative sin(x)
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4th/4ways: trig derivative sin(x)

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❤️

MackingV.MackingV.

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William & Mary Math 112: trig integral x cos(3x) dx
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William & Mary Math 112: trig integral x cos(3x) dx

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1st/2 ways: trig integral sin(x)/x + cos(x)/x^2 dx
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1st/2 ways: trig integral sin(x)/x + cos(x)/x^2 dx

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"It's really beautiful."
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"It's really beautiful."

joaquin_stein_04joaquin_stein_04

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【4K】Everyone, stand up and sing the battle song~

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Having children is all about fun! Have you ever tried this trick?

ru_____gbaituanziru_____gbaituanzi

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