Question

Calcule o valor de cada expressão.​

Answer 1

Resposta:

Olá bom dia!

a)

3 + 4 = 7

b)

-5 + 49 = 45

c)

$-\sqrt{8} = -\sqrt{2^3} = - \sqrt{2^2 .2} = \sqrt{2^2} .\sqrt{2} = 2\sqrt{2}$

Logo:

$2\sqrt{2}+\sqrt{144} = 2\sqrt{2}+12$ => resposta

d)

10 - 8 = 2

e)

-11 + 14 = 3

f)

$\sqrt{27} = \sqrt{3^3} = \sqrt{3^2.3} = \sqrt{3^2} .\sqrt{3} = 3\sqrt{3}$

Logo:

$3\sqrt{3} - 3$ => resposta

g)

13 - 25 = -8

i)

0,04 = 4/100 = $\sqrt{4/100} = \sqrt{4} / \sqrt{100} = 2/10 = 0,2$

0,09 = 9/100 = $\sqrt{9}/\sqrt{100} = 3/10 = 0,3$

0,16 = 16/100 = $\sqrt{16} /\sqrt{100} = 4/10 = 0,4$

0,2 - 0,3 + 0,16 = -0,1 + 0,16 = 0,15

j)

$\sqrt{1/4} = \sqrt{1} / \sqrt{4} = 1/2\\\\\sqrt{1/9} = \sqrt{1} / \sqrt{9} = 1/3\\ \\\sqrt{1/16} = \sqrt{1} / \sqrt{16} = 1/4\\\\\frac{1}{2} - \frac{1}{3} + \frac{1}{4} = \\\\ \frac{1.6-1.4+1.3}{12} =\\\\\frac{6-4+3}{12} =\\\\\frac{2+3}{12} =\\\\\frac{5}{12}$