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

1st/2 parts: Inverse 2x2 matrix

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Pantun Melayu [Buah cempedak di luar pagar]

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2 ways: sq root derivative 1/(√√(1/√x))

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Pantun Melayu [Sorong papan tarik papan]

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logic Idempotent law show x=xVx

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2nd way: trig integral (3-tan^2(x))/(cot(x)-3tan(x)) dx

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Review: Product to Sum Identities

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Teacher, Xiao Shi is studying today too—should I shake it a bit faster?

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Growing patterns #2

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3 ways: derivative log(x+ (1+√(x^2)))

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4th/5ways: triangular num: Show t(n-1) + tn = n^2 where tn = nth triangular number

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Eps_1 cinta cowok introvert ketemu cewe buta yang justru bisa melihat hatinya

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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)

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Polite number

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Review Add Math: Show a^m a^n = a^(m+n) where m & n are any 2 positive integers

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Show Σ(a+bk) = (a+1/2bn)(n+1)

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Evaluate these 9 integrals containing ...

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3 ways: trig integral 1/(1+cos(x)) dx

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prob stat: The prob. that it will snow tomorrow is 0.75.

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trig integral ∫1/(√sin(x) √cos^7(x)) dx

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