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Exercises 9.5: Factorial

WRITING

1.  $2!$

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2.  $2!=2·1$

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3.  $\left(2+1\right)!$

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4.  $\frac{6!}{5!}$

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5.  $3!+7!$

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READING

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PROOFREADING

11.  $5!=5·4·3·2·1$

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12.  $\left(5-2\right)!$

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13.  $6!-4!$

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