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karspider
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Prove that the rᵗʰ term in the nᵗʰ row of Pascal's triangle is nCr.
nCr formula: n!/r!(n-r)!
I've tried everything I can but I don't know how to approach this question.
nCr formula: n!/r!(n-r)!
I've tried everything I can but I don't know how to approach this question.