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Quadratic Formula

Find n if: a ...

Question

Find n if: (a) ⁿP₂ = 30 (b) ⁿP₃ = 210

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Solution

(a)

∴n = 6

(b)

∴n = 7

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^{n} P_{3} :^{n} P_{6} = 1 : 210,

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