Question

AJUDA PFVR!!!!
Simplifique as frações.
a) 12!/13!
b) 9!/7!
c) 8!/5!
d) 8!•10!/6!•9!
e) 5!•8!/3!•12!
f) (n+2)!/n!
g) (n-3)!/(n-5)!​

Answer 1

Explicação passo-a-passo:

a) 12!

____=

13.12!

1/13

b) 9.8.7!

______=

7!

9.8=

72

c) 8.7.6.5!

_______=

5!

8.7.6=

336

d) 8.7.6! 10.9!

_________=

6! 9!

8.7.10=

560

f) (n+2).(n+1).n!

___________=

n!

(n+2).(n+1)=

n² + n +2n +2=

n² +3n +2

g) ( n -3) .(n-4) .( n-5)!

_______________=

(n-5)!

(n-3) . (n-4)=

n² -4n -3n +12=

n² - 7n +12