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Obtain the values of the following:

9P9

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9P9 = \(\frac{9!}{(9−9)!}\)

\(\frac{9!}{0!}\)

= 9!

= 9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1 = 362880

∴ 9P9 = 362880

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