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integration

consider the function y=a^x where a is a constant. show that x= ln y/ ln x

i tried using the log formula but i have had no luck can someone help me please
Original post by markosheehan
consider the function y=a^x where a is a constant. show that x= ln y/ ln x

i tried using the log formula but i have had no luck can someone help me please


Show what you've tried.
Original post by markosheehan
consider the function y=a^x where a is a constant. show that x= ln y/ ln x

i tried using the log formula but i have had no luck can someone help me please


Just to add, a rather unfortunate typo there :tongue: I think you mean x=lnylna x = \frac{lny}{lna} .
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RichE
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Original post by markosheehan
consider the function y=a^x where a is a constant. show that x= ln y/ ln x

i tried using the log formula but i have had no luck can someone help me please


Have you typed that formula right?
Original post by SeanFM
Just to add, a rather unfortunate typo there :tongue: I think you mean x=lnylna x = \frac{lny}{lna} .


Not to mention the title, where's the integration??? :rofl:
Original post by RDKGames
Not to mention the title, where's the integration??? :rofl:


To be fair I think it's a 'hence find the integral of a^x wrt x' or something type question.
Original post by SeanFM
To be fair I think it's a 'hence find the integral of a^x wrt x' or something type question.


I suppose we'll never know if people keep posting questions in this way.
I typed it wrong. Can anyone help me what should i try do?
Take the natural log of both sides
lnax=xlna=lnylna^x = xlna = lny
(edited 7 years ago)
Original post by markosheehan
I typed it wrong. Can anyone help me what should i try do?


Know your rule of logc(ab)=blogc(a)log_c(a^b)=blog_c(a). Take natural logs of both sides.
(edited 7 years ago)
Ok i get it now thanks

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