Nevra
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Inverse f(x)=ln(5x-2)
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Kallisto
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#2
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(Original post by Nevra)
Inverse f(x)=ln(5x-2)
f(x) = y

Change y and x in this equation first. Do you know what the inverse of ln is? right, it is the e-function! you have to change this ln function to an e function.
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Kallisto
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I was looking for a good page for inverse logarithmic functions, and I was successful. For explanations -> use this link!
Last edited by Kallisto; 3 weeks ago
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thisistemp
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(Original post by Nevra)
Inverse f(x)=ln(5x-2)
edited cos apparently full solutions aren't allowed :/

let f(x) = y makes it easier to see what you're doing imo
y = ln(5x-2) you need to make x the subject by getting rid of ln(...). try replacing it with its inverse

make sure to give in the form of f^-1(x) at the end
Last edited by thisistemp; 3 weeks ago
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davros
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(Original post by thisistemp)
let f(x) = y .(easy to see what you're doing )
Please edit / delete your post - it's against forum rules to post full solutions!

Stick to hints / guidance so the OP can solve by themselves
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Kallisto
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(Original post by thisistemp)
edited cos apparently full solutions aren't allowed :/

let f(x) = y .(makes it easier to see what you're doing )
y = ln(5x-2) .you need to make x the subject by getting rid of ln(...). try replacing it with its inverse
(e^x + 2) / 5 = y .give in the form of f^-1(x) and you're done
You can reply clues here at this place, but not the whole solution of the problem! that is against the rules, so please change it. :yes:
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