1st/2parts 3 ways: tn-1 + tn = n^2 where tn = nth triangular number

trig integral ∫sec(x) dx =

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logic Idempotent law show x=xVx

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Pantun Melayu [Pulau Pandan Jauh Ke Tengah]

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1st way: exp ∫(e^x)/x (1+x log(x)) dx

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Alternate way: 2nd picture Show 1+3+5+...+(2n-1)=n^2

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Review: Arithmetic Series a+(a+d)+(a+2d)+...+(a+(n-1)d)=

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Careful: arc sin(sin(5π/4)) ≠ ...

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EP 7 - Tenmaku no Jaadugar Sub Indo

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

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review: prob stat Population variance vs sample variance

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prob stat: A group consists of 4 girls & 7 boys. In how many ways can a team of 5 members ...

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2 ways: derivative ln(ax-b)^(p-qx)

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2nd/2 ways: Show 1+3+5+ ... +(2n-1) + (2n+1) + (2n-1)+...+5+3+1= n^2 + (n+1)^2

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Matriculation & Calculus: Show if y=f(x) g(x) h(x) k(x)

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integral ∫x^2/√(x^2+a^2) dx

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