|
|
Question
#71644. TexanPete
asks:
If it is known that, for example, x^3 = 200; is there a way of working out the value of x with just this information?
|
zeller
|
Yes by using logarithms:
x^3 = 200 taking logs to both sides(base 10)
log x^3 = log 200 using laws of logarithms
3log x = log 200 so
3 log x = 2.3
log x = 2.3 ÷ 3
log x = 0.77 taking antilogs to both sides
x = 5.9 (approx)
Easy really!!
Oct 20 06, 5:20 AM
|
malarson
 |
Or just do the cube root of both sides.
Oct 20 06, 7:23 AM
|
zeller
|
Lol that is true - I read it as 3^x in which case logarithms would do of course!
Oct 20 06, 2:00 PM
|
|
Fun Trivia | 
Quizzes | 
Games
| 
People | 
Services | 
Help | 
Me
Sign up for your FREE FunTrivia ID! Compete,
play free games, and meet people! Click here...
Have a question that you want answered? Are you able to answer questions from other FunTrivia guests? Then you have come to the right
place!