Question

1)No caderno efetue...
2)Resolva no caderno as equações, em IR...
Me ajudaaaaaa gente..​

Answer 1

respostas na foto...

Espero ter ajudado^_^

me sigam por favor ❤️

Answer 2

Oie, Td Bom?!

1.

a)

$= |5| + | - 4|$

$= 5 + 4$

$= 9$

b)

$= |1| - | - 3| + |7|$

$= 1 - 3 + 7$

$= 8 - 3$

$= 5$

c)

$= |10| \: . \: |2| - |8|$

$= 10 \: . \: 2 - 8$

$= 20 - 8$

$= 12$

d)

$= |1 \: . \: ( - 2) + 5| \: . \: |3|$

$= | - 2 + 5| \: . \: 3$

$= |3| \: . \: 3$

$= 3 \: . \: 3$

$= 9$

2.

a)

$|x + 5| = 2$

• $x + 5 = 2$

$x = 2 - 5$

$x = - 3$

• $x + 5 = - 2$

$x = - 2 - 5$

$x = - 7$

$S = \left \{ - 7  \: , \: - 3 \right \}$

b)

$|10y| = 48$

$|10| \: . \: |y| = 48$

$10 \: . \: |y| = 48$

$|y| = \frac{48}{10}$

$|y| = \frac{24}{5}$

$S = \left \{ - \frac{24}{5}   \: , \: \frac{24}{5} \right \}$

c)

$|8 - z| = 4$

• $8 - z = 4$

$- z = 4 - 8$

$- z = - 4 \: . \: ( - 1)$

$z = 4$

• $8 - z = - 4$

$- z = - 4 - 8$

$- z = - 12 \: . \: ( - 1)$

$z = 12$

$S = \left \{4  \: , \: 12\right \}$

d)

$|3w - 1| = w + 3$

$|3w - 1| - w = 3$

• $3w - 1 - w = 3$

$2w - 1 = 3$

$2w = 3 + 1$

$2w = 4$

$w = \frac{4}{2}$

$w = 2$

• $3w - 1 \geqslant 0$

$3w \geqslant 1$

$w \geqslant \frac{1}{3}$

• $- (3w - 1) - w = 3$

$- 3w + 1 - w = 3$

$- 4w + 1 = 3$

$- 4w = 3 - 1$

$- 4w = 2 \: . \: ( - 1)$

$4w = - 2$

$w = - \frac{ 2}{4}$

$w = - \frac{1}{2}$

• $3w - 1 < 0$

$3w < 1$

$w < \frac{1}{3}$

• $w = 2 \: , \: w \geqslant \frac{1}{3} ⇒w = 2$

• $w = - \frac{1}{2} \: ,\: w < \frac{1}{3} ⇒w = - \frac{1}{2}$

$S = \left \{ - \frac{1}{2}   \: , \: 2 \right \}$

Att. Makaveli1996