How do you answer this on a calculator?
2009-01-07 4:31 am
Like let's say this problem. 5^x=1953125. How would you solve that using a calculator?
回答 (7)
2009-01-07 4:37 am
✔ 最佳答案
5^x = 1953125Take ln of both sides:
x ln5 = ln 1953125
Divide :
x = ln 1953125 / ln5
Now put that in your calculator.
x = 9
2009-01-07 2:28 pm
5^x = 1953125
log_5[5^x] = log_5[1953125]
x = log[1953125]/log[5]
x = 9
log_5[5^x] = log_5[1953125]
x = log[1953125]/log[5]
x = 9
2009-01-07 12:43 pm
You can't really solve this with a calculator unless you have a TI-89( i think. TI - 89 is a beastly machine which can solve basically anything).
But you can get help from any calculator that is able to use the log function (I recommend the TI - 83 or 84 or higher ^_^). The reason being that you will have to log both sides getting
log 5^x = log 1953125. Because the x is an exponent you can bring it down. x log 5 = log 1953125. Here you whip out ur calc. and punch in (log 1953125) / (log 5). You should get x = 9.
Sorry if this was confusing. first time writing an answer on yahoo.
But you can get help from any calculator that is able to use the log function (I recommend the TI - 83 or 84 or higher ^_^). The reason being that you will have to log both sides getting
log 5^x = log 1953125. Because the x is an exponent you can bring it down. x log 5 = log 1953125. Here you whip out ur calc. and punch in (log 1953125) / (log 5). You should get x = 9.
Sorry if this was confusing. first time writing an answer on yahoo.
2009-01-07 12:37 pm
take log of 1953125 then divide by 'log of 5'.
2009-01-07 12:36 pm
use logs....x = ln[1953125] / ln [5]
2009-01-07 12:36 pm
It can be solved by:
log(1953125)/log(5)
log(1953125)/log(5)
2009-01-07 12:35 pm
take log of 1953125 then divide by 5. (i'm pretty sure, check the answer)
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