rose831
rose831 rose831
  • 04-01-2020
  • Mathematics
contestada

If Log x (1 / 8) = - 3 / 2, then x is equal to.

A. - 4
B. 4
C. 1 / 4
D: 0

Respuesta :

nonsibi
nonsibi nonsibi
  • 04-01-2020

[tex]log_{x}(1/8)=-3/2[/tex]

This is equal to...

[tex]x^{-3/2}=1/8[/tex]

We want "x" so we need to isolate it using laws of exponents...

[tex]x^{(-1)(3/2)}=1/8[/tex]

[tex]x^{3/2}=8[/tex] because [tex]x^{-a}=1/x^{a}[/tex]

[tex]x=\sqrt[3]{8^{2}}[/tex] because [tex]x^{a/b}=\sqrt[b]{x^{a}}[/tex]

x = 4

answer: B

Answer Link

Otras preguntas

List the 4 main peninsulas of Europe
If BA + C = D, solve for A
A sequence is defined recursively using the equation f(n + 1) = f(n) – 8. If f(1) = 100, what is f(6)?
What do we learn about the danes in the newspaper in number the stars
People with computer skills and strong backgrounds in 2 and science will have key tools to succeed in the new global economy a. True b. False
How old is the United states
The main purpose of taxes is to: A. generate revenue for funding government programs. B. reduce the chances of inflation. C. create jobs. D. discourage use o
In pure water, a red blood cell from an animal will swell and burst, but a leaf cell from a plant will not. Which structure in the leaf cell is responsible
Mrs nine is correcting math tests. She corrects 7 tests before school, and 5 tests after school. If each test takes her 1/5 hour to correct, how long will it t
In the first month of the year 1935 1944 1933 1929, Hitler became the prime minister