Question

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Answer 1

Resposta:

30. A)111/10 B) 0 C)39/1640 d) 3570/43

A) (11!+9!)10!=(11.10!+9!)/10!

(11!+9!)/10!=11+9!/10!

10!=10.9!

(11!+9!)/10=11+1/10

(11!+9!)/10!=111/10.

B) 17!-17.16!=17.16!-17.16!

17!-17.16!=0.

C)(40!-39!)=41!/41!-39/41!

(40!-39!)/41=40!41.40-39!/41.40.39!

(40!-39!)/41!=1/41-1/41.40

(40!-39!)/41!=1/41-1/41.1/40

(40!-39!)/41!=1/41(1-1/40)

(40!-39!)/41!=1/41.39/40

(40!-39!)/41!=39/1640.

D) (85!)'2/86!83!=85!85!/86!83!

(85!)'2/86!83!=85!85!/86.85!83!

(85!)'2/86!83!=85!84/86

(85!)'2/86!83!=7140/86

(85!)'2/86!83!=3570/43.

31. A) V b) F c) V d) F e) F

Explicação passo a passo:

Espero ter ajudado!!!