Solving an unknown with a ln

Solve H if 5^H=15265 if ln(5^H)=H*ln(5) Getting a subscript error any help?

[Thorsten]

Please post your complete minimal Matlab code that generates the error, and the exact error that is displayed.

[James Tursa]

Note: The MATLAB function for the natural logarithm function ln is called log.

Answer 1

[James Tursa]

Can't you just substitute your expression and then divide by the appropriate value?

[Anass Banbouk]

I've tried substitution it doesn't seem to work.

[James Tursa]

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]

I've had too many coffees and I was drawing a blank on an obvious solution thank you for pointing it out.