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Maths nerds I need your help

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holymackerel
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20 Nov 2020, 4:22 pm

I dont have a lecturer for a month. A course I am paying thousands for is making my class teach themselves for one of the timed assesments. Is 1 converted to a logarithm log 10 10 or log 10 1?

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Fnord
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20 Nov 2020, 4:38 pm

log(1) = 0

3 x log(2) + 1/2 x log(16) - 1 = 0.505

(To 3 significant digits)

Next question?


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holymackerel
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20 Nov 2020, 4:42 pm

Fnord wrote:
log(1) = 0
ln(1) = 0

Next question?


This is how my classmates tried to explain it to me. I dont understand though. What is the subject, the answer or the power? I know what the answer to log(1) is. When you convert a number to a logarithm do you make it the power and subject or the answer to the power?



holymackerel
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20 Nov 2020, 4:52 pm

Did I get the right answer or is it 32?

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Fnord
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20 Nov 2020, 5:03 pm

I worked out 3 x log(2) + 1/2 x log(16) - 1 on a calculator.


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holymackerel
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20 Nov 2020, 5:06 pm

Fnord wrote:
I worked out 3 x log(2) + 1/2 x log(16) - 1 on a calculator.

Oh ok. I think you might run into order of operations conflicts on things like this. Doing multiple functions on a calculator is always a bit dodgy.



Fnord
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20 Nov 2020, 5:07 pm

holymackerel wrote:
Fnord wrote:
I worked out 3 x log(2) + 1/2 x log(16) - 1 on a calculator.
Oh ok. I think you might run into order of operations conflicts on things like this. Doing multiple functions on a calculator is always a bit dodgy.
Not really.  Just follow the Order of Precedence and use the memory functions.

I got the same answer on my Pickett slide rule.

But it has been a long day, so maybe I can no longer do brain well.


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holymackerel
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20 Nov 2020, 5:22 pm

Fnord wrote:
holymackerel wrote:
Fnord wrote:
I worked out 3 x log(2) + 1/2 x log(16) - 1 on a calculator.
Oh ok. I think you might run into order of operations conflicts on things like this. Doing multiple functions on a calculator is always a bit dodgy.
Not really.  Just follow the Order of Precedence and use the memory functions.

I got the same answer on my Pickett slide rule.

But it has been a long day, so maybe I can no longer do brain well.


Thanks. I just typed it in. Your answer correlates with it being log 10 10 like the 2nd picture I posted.