Question

calcule o valor das expressões:

a)
$(\frac{1}{2} ) {}^{ - 2} + (\frac{1}{2} ) {}^{ - 3} + ( \frac{1}{2} ) {}^{ - 1}$
b)
$( \frac{2}{3} ) {}^{ - 2} + ( \frac{5}{2} ) {}^{3}$
c)
$( - \frac{1}{4} ) {}^{ - 3} + ( \frac{2}{7} ) {}^{ - 2}$
d)
$( \frac{3}{5} ) {}^{ - 3} + ( - \frac{4}{9} ) {}^{2}$




ME AJUDA AE GENTE EU TENHO QUE ENTREGAR HOJE ​

Answer 1

Resposta:

Explicação passo-a-passo:

(1/2)^-2 + (1/2)^3+ (1/2)^-1=

2^2 + 2^3 +2^1=

4+8+1=

13

(2/3)^-2 + (5/2)^3=

(3/2)^2 + (125/8)=

9/4 +125/8=

18/8+125/8=

143/8

(-1/4)^-3 + (2/7)^-2=

(-4)^3 + (7/2)^2=

-64 + 49/4=

-256/4 + 49/4=

-207/4

(3/5)^-3 + (-4/9)^2=

(5/3)^3 + 16/81=

125/27 + 16/81=

375/81 + 16/81=

391/81