Question

Me ajudem a resolver por favor

Answer 1

Resposta:

Explicação passo-a-passo:

1)

a) $( \frac{3}{4})^{-2} = (\frac{4}{3})^{2} = \frac{16}{9}$

b)$( \frac{2}{5})^{-3} = (\frac{5}{2})^{3} = \frac{125}{8}$

c) $( \frac{1}{5})^{-2} = (\frac{5}{1})^{2} = \frac{25}{1} = 25$

d) $(8)^{-1} = (\frac{1}{8})^{1} = \frac{1}{8}$

e) $( \frac{3}{10})^{-4} = (\frac{10}{3})^{4} = \frac{10000}{81}$

2)

a) $+ \sqrt{36} = 6$

b) $+ \sqrt{9\\} = 3$

c) $-\sqrt{25} = -5$

d) $+ \sqrt{1} = 1$

e) $+ \sqrt{-4} =$ ∉ ℝ

f) $- \sqrt{64} = -8$

3)

3x + 5

x + y

x/2 - 6

x - 20

5x - 2y

4)

b) P = 2a + 5b + 6a + b + 4b

   P = 8a + 5b + b + 4b

   P = 8a + 10b

c) P = 2. (4x + 3) + 2. (2x)

   P = 8x + 6 + 4x

   P = 12x + 6