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Nilai dari  adalah ...

Nilai dari begin mathsize 14px style fraction numerator 1 over denominator 20 factorial end fraction minus fraction numerator 15 over denominator 21 factorial end fraction plus fraction numerator 12 over denominator 22 factorial end fraction end style adalah ...

  1. begin mathsize 14px style fraction numerator 98 over denominator 22 factorial end fraction end style 

  2. begin mathsize 14px style fraction numerator 108 over denominator 22 factorial end fraction end style 

  3. begin mathsize 14px style fraction numerator 124 over denominator 22 factorial end fraction end style 

  4. begin mathsize 14px style fraction numerator 144 over denominator 22 factorial end fraction end style 

  5. begin mathsize 14px style fraction numerator 159 over denominator 22 factorial end fraction end style 

Jawaban:

Nilai dari begin mathsize 14px style fraction numerator 1 over denominator 20 factorial end fraction minus fraction numerator 15 over denominator 21 factorial end fraction plus fraction numerator 12 over denominator 22 factorial end fraction end style adalah 

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell fraction numerator 1 over denominator 20 factorial end fraction minus fraction numerator 15 over denominator 21 factorial end fraction plus fraction numerator 12 over denominator 22 factorial end fraction end cell equals cell fraction numerator open parentheses 21 times 22 times 1 close parentheses over denominator 22 factorial end fraction minus fraction numerator open parentheses 15 times 22 close parentheses over denominator 22 factorial end fraction plus fraction numerator 12 over denominator 22 factorial end fraction end cell row blank equals cell fraction numerator 462 over denominator 22 factorial end fraction minus fraction numerator 330 over denominator 22 factorial end fraction plus fraction numerator 12 over denominator 22 factorial end fraction end cell row blank equals cell fraction numerator 144 over denominator 22 factorial end fraction end cell end table end style 

Jadi, jawaban yang tepat adalah D.

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