Question

dada a função f(X) =27x+3
a) X, tal, que f(X) =9
B) X, tal, que f(X) =49
C) X, tal, que f(X) =72
D) X, tal, que f(X) = 42
E) X, tal, que f(X) =35​

Answer 1

Resposta:

a) x = 0,222...

b) x = 1,703703...

c) x = 2,555...

d) x = 1,444...

e) x = 1,185185...

Explicação passo a passo:

a) 9 = 27x + 3

27x = 6

x = 6 / 27

x = 0,222...

b) 49 = 27x + 3

27x = 46

x = 46/27

x = 1,703703...

c) 72 = 27x + 3

27x = 69

x = 69 / 27

x = 2,555...

d) 42 = 27x + 3

27x = 39

x = 39 / 27

x = 1,444...

e) 35 = 27x + 3

27x = 32

x = 32 / 27

x = 1,185185...

Answer 2

Explicação passo-a-passo:

f(x)= 27x +3

a) 9 = 27x +3

9-3= 27x

6 = 27x

6/27= x

x= 27÷3

____

6÷3

x= 9/2

b) 49 = 27x +3

49 -3= 27x

46= 27x

46/27=x

x= 46/27

c) 72= 27x +3

72 -3= 27x

69= 27x

69/27= x

x= 69 ÷ 3

_____

27÷ 3

x= 23/9

d) 42= 27x +3

42 -3= 27x

39/27= x

x= 39÷3

_____

27 ÷3

x= 13/9

e) 35 = 27x +3

35-3= 27x

32 = 27x

32/27= x

x= 32/27