Question

Resolva as expressões numericas ajudar por favor ​

Answer 1

Resposta:

3)

a)

3+{4•2•[4-2+(7-12÷3)]}

3 + { 8 • [ 4 - 2 + ( 7 - 4)]}

3 + { 8 • [ 4 - 2 + 3]}

3 + { 8 • [2 + 3]}

3 + { 8 • 5 }

3 + 40

45

b)

-20-3•[(-5+23):(-6•-1)]

-20-3•[(18)÷(+6)]

-20-3•[3]

-23 • 3

-69

4)

a) [ x E n / 7 > x < 1 ]

x = { 0 , - 1 , - 2 , - ∞}

b) [ x E z / x² = 16 ]

x² = 16

x = ± √16

x = ± 4

x = { -4 , +4 }

c) [ x E Q / x² = 3 ]

x² = 3

x ≈ ± √3

x ≈ ±1,73

x ≈ { -1,73 , +1,73 }

d) [ x E Q / x = 1/2 + 1/3 ]

x = 3/6 + 2/6

x = 5/6

x = { 5/6 }