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#1
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How to determine the value?
Power(2,a) = 1,
Does anyone have any suggestions on how to determine the value of a? Thank for any suggestions Eric |
#2
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How to determine the value?
0
-- Gary''s Student - gsnu200737 "Eric" wrote: Power(2,a) = 1, Does anyone have any suggestions on how to determine the value of a? Thank for any suggestions Eric |
#3
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How to determine the value?
The answer to your immediate question is 0 but I guess that's just indicative
of a more general question. How about using Solver Put this in a cell =2^A1 and solve for that cell to the value you know by changing A1 Mike "Eric" wrote: Power(2,a) = 1, Does anyone have any suggestions on how to determine the value of a? Thank for any suggestions Eric |
#4
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How to determine the value?
On Aug 15, 6:08 am, Eric wrote:
Power(2,a) = 1, Does anyone have any suggestions on how to determine the value of a? More generally, if power(b,x) = n, then x = log(n) / log(b). But beware of inaccuracies introduced by the computational error that is inherent in computer arithmetic. Always check to see if power(b,x) truly is n. PS: You can replace power(2,a) with 2^a. One less (nested) function. |
#5
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How to determine the value?
Or use some algebra:
=Power(2,a) is the same as 2^a (2 raised to the power of a The equality to start 2^a = 1 taking the natural log of both sides: ln(2^a) = ln(1) the left hand side becomes: a*ln(2) the right hand side becomes 0 so a*ln(2) = 0 divide both sides by ln(2) a = 0/ln(2) or a = 0 ===== So if you had =power(2,a) = x you could do the same thing 2^a = 1 taking the natural log of both sides: ln(2^a) = ln(x) the left hand side becomes: a*ln(2) so a*ln(2) = ln(x) divide both sides by ln(2) a = ln(x)/ln(2) Eric wrote: Power(2,a) = 1, Does anyone have any suggestions on how to determine the value of a? Thank for any suggestions Eric -- Dave Peterson |
#6
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How to determine the value?
You don't need to use Solver.
The formula for a =LOG(1)/LOG(2) -- David Biddulph "Mike H" wrote in message ... The answer to your immediate question is 0 but I guess that's just indicative of a more general question. How about using Solver Put this in a cell =2^A1 and solve for that cell to the value you know by changing A1 "Eric" wrote: Power(2,a) = 1, Does anyone have any suggestions on how to determine the value of a? Thank for any suggestions Eric |
#7
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How to determine the value?
.... or of course simply =LOG(1,2)
-- David Biddulph "David Biddulph" <groups [at] biddulph.org.uk wrote in message ... You don't need to use Solver. The formula for a =LOG(1)/LOG(2) "Mike H" wrote in message ... The answer to your immediate question is 0 but I guess that's just indicative of a more general question. How about using Solver Put this in a cell =2^A1 and solve for that cell to the value you know by changing A1 "Eric" wrote: Power(2,a) = 1, Does anyone have any suggestions on how to determine the value of a? Thank for any suggestions Eric |
#8
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Thank everyone for suggestions
Thank everyone for suggestions
Eric "Dave Peterson" wrote: Or use some algebra: =Power(2,a) is the same as 2^a (2 raised to the power of a The equality to start 2^a = 1 taking the natural log of both sides: ln(2^a) = ln(1) the left hand side becomes: a*ln(2) the right hand side becomes 0 so a*ln(2) = 0 divide both sides by ln(2) a = 0/ln(2) or a = 0 ===== So if you had =power(2,a) = x you could do the same thing 2^a = 1 taking the natural log of both sides: ln(2^a) = ln(x) the left hand side becomes: a*ln(2) so a*ln(2) = ln(x) divide both sides by ln(2) a = ln(x)/ln(2) Eric wrote: Power(2,a) = 1, Does anyone have any suggestions on how to determine the value of a? Thank for any suggestions Eric -- Dave Peterson |
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