What is (20!)/((20-3)!) ?

The solution to (20!)/((20-3)!) is 6840

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simplify (20!)/((20-3)!)

simplify

\frac{20 !}{( 20 - 3 ) !}

6840

Solution steps

\frac{20 !}{( 20 - 3 ) !}

Cancel the factorials:

\frac{n !}{( n - m ) !} = n \cdot (n - 1) \dots (n - m + 1), n > m

\frac{20 !}{( 20 - 3 ) !} = 20 \cdot 19 \cdot 18

= 20 \cdot 19 \cdot 18

Multiply the numbers:

20 \cdot 19 \cdot 18 = 6840

= 6840

8 y - 3 = - 13

- \frac{1}{2}

(2 + 2 i)^{6}

4 a^{2} - 22 a + 10

(\frac{1}{2} y)^{2}