Question

alguém consegue fazer pelo menos daqui?
pfvr​

Answer 1

Explicação passo a passo:

a)

$2\times5!=2\times(5.4.3.2.1)\\ \\ 2\times(120)=240$

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b)

$8\times3!=\\ \\ 8\times(3.2.1)=\\ \\ 8\times(6)=48$

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c)

$4\times0!=4\times(1)=4$

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d)

${8!\over6!}={8.7.\not6!\over\not6!}=8.7=56$

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e)

${100!\over98!}={100.99.\not98!\over\not98!}=9.900$

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f)

${3\times4!\over7!}={3\times(4.3.2.1)!\over(7.6.5.4.3.2.1)!}={3\over7.6.5}={3\over210}={1\over70$

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g)

${4\times5!-3\times4!\over4!}=\\ \\ {4.(5.4.3.2.1)!-3.(4.3.2.1)!\over4.3.2.1!}=\\ \\ {4.(120)-3.(24)\over24}=\\ \\ {480-62\over24}={418\over24}=17$