Question

Respondam apenas o 2 quesito.

Answer 1

Resposta:

Explicação passo-a-passo:

a)

(-2)²-2⁻¹=

4-1/2=

(8-1)/2

7/2

b)

4⁰+4⁻¹-5⁻¹=

1+1/4-1/5=

(20+5-4)/20=

21/20

c)

2.10⁻¹+3.2⁻²=

2/10+3/2²=

2/10+3/4=

(4+15)/20=

19/20

d)

[(-5)²-4²]/(2⁻¹+2⁻²)=

[(-5)(-5)-4.4]/(1/2+1/2²)=

[25-16]/(1/2+1/2.2)=

9/(1/2+1/4)=

9/[(2+1)/4]=

9/[3/4]=

9.4/3=

3.4=

12