Solving an unknown with a ln

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Anass Banbouk
Anass Banbouk 2016-9-23
评论： Anass Banbouk 2016-9-23
Solve H if 5^H=15265 if ln(5^H)=H*ln(5) Getting a subscript error any help?
  2 个评论
Thorsten
Thorsten 2016-9-23
Please post your complete minimal Matlab code that generates the error, and the exact error that is displayed.
James Tursa
James Tursa 2016-9-23
Note: The MATLAB function for the natural logarithm function ln is called log.

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James Tursa
James Tursa 2016-9-23
Can't you just substitute your expression and then divide by the appropriate value?
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James Tursa
James Tursa 2016-9-23
编辑：James Tursa 2016-9-23
So, you start with this:
5^H = 15265
and this
ln(5^H) = H*ln(5)
Can't you figure out how to apply some type of operation to the 1st equation to make it look like the 2nd equation? And then do an appropriate substitution based on the 2nd equation?
Anass Banbouk
Anass Banbouk 2016-9-23
I've had too many coffees and I was drawing a blank on an obvious solution thank you for pointing it out.

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