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

Bijection of elements in tn & a pair of elements of (n+1)

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Find the number of permutations of the letters of the word ALLAHABAD

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Pantun Melayu [Buah cempedak di luar pagar]

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lim x/e^x? as x→∞

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count quick review: Permutation vs Combination

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2 ways: The following measurements were taken by an antique dealer as he weighted to the ...

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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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Pantun Melayu [Sorong papan tarik papan]

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example: Mean, Median & Mode

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

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2nd/2 ways: Alternate way: Given 2 points, find equation of st line passing the ..

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3rd/3 ways: Alternate way: Given 2 points, find equation of st line passing the ..

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1st/2ways: logic Import-Export

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Tongue 𝙙𝙚𝙫𝙞𝙖𝙩𝙞𝙤𝙣 𝙖𝙣𝙜𝙡𝙚 as the warning sign of a 🆂🆃🆁🅾🅺🅴

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U of Auckland: proc & stat Let X be a continuous random variable with p.d.f

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logic: Show p→q ≡¬ p∨q

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prob stat Toss a pair of fair 6-sided dice. The sample space has 36 outcomes.

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2 ways: integral ∫(a^2-x^2) dx

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