1. The problem statement, all variables and given/known data Give the inverse of this function N=f(L)=18^{16-8L} The answer has to be filled in in Maple 2. Relevant equations 3. The attempt at a solution N=18^{16-8L} 16-8L=ln(N)/ln(18) -8L=(ln(N)/ln(18))-16 L=-ln(N)/(8*ln(18))+2 Is this correct? When i fill this in in maple it's incorrect. I've really no clue why it is wrong.
L=-ln(N)/(8*ln(18))+2 is the same function as the original. Choose L the independent variable and N the dependent one. (Just exchange L and N). ehild
Yes it's correct. What are you typing into maple exactly? Your syntax is probably slightly off. edit: Sorry I didn't notice that you forgot to swap your variables.
thanks! It's also mentioned that it should be simplified as much as possible. Does that mean that the 8*LN(18) could be simplified to 8*LN(2*9) and more?
It's as simple as it can get, unless you believe [itex]\ln{\frac{1}{x}}[/itex] is more simple than [itex]-\ln{x}[/itex] you shouldn't be changing anything. [itex]\ln{18}[/itex] is definitely more desirable than [itex]\ln{9\cdot2}[/itex]
When I let Maple solve the equation for L it gives me exactly what you wrote. Why do you think Maple thinks it is incorrectÉ What type of error message are you receivingÉ That annoying É is actually a question mark, but when I type it in it gives me that accented E; that only seems to happen when I access this website through Google Chrome! RGV
Well, this assignment was given in a little online test. The point is, that i can't see why the answer was wrong. I have 2 chances, so for the second change i will try to swap the variables.