2 ways of "counting" (a+b)^2 = a^2+2ab+b^2

Ga kenal tapi ngajak ena ena mulu

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logic: tautology (¬p→q)∧(¬p→¬q) →p

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

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Pantun Melayu [Buah cempedak di luar pagar]

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exp Differentiate (i) b^e^x (ii) b^x&e (iii) (b^e)^x (iv) (b^x)^e

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RPET 2003 Hindustan: integral ∫sin^4(x)-cos^4(x) dx

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3 picture views of the sum ... 1+2+3+...+n

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Pure Math: Calculate the coordinates of the two points on the curve

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3 ways: Derivative x^(-1/x)

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Diff Eq: Solve sec(x) dy/dx=y+sin(x) via Integrating factor [IF]

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Calculus: Find nth derivative of log(ax+b)

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Lamar U: Derivatives of Exponential & Log Functions Practice Problems.

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3 ways: If y=x/(1+x^2) find dy/dx.

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logic: tautology p→q≡(¬q→¬p)

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rational function integral x/(x-√(x^2-1)) dx

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prob stat: Compute Var(X) when X represents the outcome when we roll a fair die.

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rational function Find the derivative of f(x)=(4x^2+7)/x

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2 ways: diff eq Solve dy/dx=y-1

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2nd/2ways: Find the sum 1/7, 10/21, 17/21, 24/21, 31/21 via "picture".

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2 ways: Derivative √ (1+√ (1+√ x)))

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