Question

algm ajuda? quanto é 2.8 elevado a x = raiz cubica de 2

Answer 1

      x
2.8      =  ∛2

  1     3x         1/3
2.  2       =   2

1 + 3x = 1
             3

mmc = 3

3.1 + 3.3x =  1
    3              3

3 + 9x = 1
9x = 1 - 3
9x = - 2
x = - 2/9

Answer 2

AE mano

$2\cdot8^x= \sqrt[3]{2}\\ 2\cdot(2^3)^x= \sqrt[3]{2^1}\\ 2^1\cdot2^{3x}=2^{ \tfrac{1}{3}}\\\\ \not2^{1+3x}=\not2^{ \tfrac{1}{3}}\\\\ 1+3x= \dfrac{1}{3}\\\\3\cdot(1+3x)=1\\ 3+9x=1\\ 9x=1-3\\ 9x=-2\\\\ x=- \dfrac{2}{9}\\\\\\ \Large\boxed{S=\left\{- \dfrac{2}{9}\right\}}$

Tenha ótimos estudos ;D