Question

matemática..... ajuda ae​

Answer 1

Resposta:

Explicação passo a passo:

a.

(n-8)!=3! [corta !]

n-8=3

n=3+8

n=11

b.

(n+5)=0!

n+5=1

n=1-5

n=-4

c.

(n-7)!=720

(n-7)!=5! [corta !]

n-7=5

n=5+7

n=12

d.

(n-2)!=24

(n-2)!=4! [corta !]

n-2=24

n=24+2

n=26

e.

(n-6)!=9(n-7)!

(n-6)(n-7)!=9(n-7)! [corta (n-7)!]

n-6=9

n=9+6

n=15

f.

(n+3)!/(n+1)!=20

(n+3)(n+2)(n+1)!/(n+1)!=20 [corta (n+1)!]

(n+3)(n+2)=20

n²+3n+2n+6=20

n²+5n+6-20=0

n²+5n-14=0

a=1

b=5

c=-14

n=-5+-V5²-4.1.-14/2.1

n=-5+-V25+56/2

n=-5+-V81/2

n=-5+-9/2

n'=-5+9/2=4/2=2

n''=-5-9/2=-14/2=-7

g.

(n-1)!=3(n-2)!

(n-1)(n-2)!=3(n-2)! [ corta (n-2)!]

n-1=3

n=3+1

n=4