List any ten contributertors with their nationality and their contribution to geometry.

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Ответ:

natalie0908

16.04.2022

Mathematics

495

Step-by-step explanation:

${12 \: }^{c} \: 4 = \frac{12!}{4!(12 - 4)!} \\ = \frac{12!}{4! \times 8!} \\ = \frac{12 \times 11 \times 10 \times 9 \times 8!}{4! \times 8!}$

canceling 8! from both numerator and denominator.

$\frac{12 \times 11 \times 10 \times 9}{4 \times 3 \times 2 \times 1} \\ = 11 \times 9 \\ = 495$

Factorial of an integer, in mathematics, is the product of all positive integers less than or equal to the given positive integer.

Factorial of a number is denoted by placing an exclamation mark behind the number

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