Find the derivative of the function:

f(x)= ln(1/7x^2)

I'm figuring that i would subtract the top of the fraction by the bottom, but then I get stuck as to how to get the derivative.. so confusing

Question

Find the derivative of the function:

f(x)= ln(1/7x^2)

I'm figuring that i would subtract the top of the fraction by the bottom, but then I get stuck as to how to get the derivative.. so confusing

anonymous · Answer

2/x

anonymous · Answer

$$\large f(x)= \ln(\frac {1}{7x^2})$$
is this your function?

anonymous · Answer

@dpaInc  yep

.sam. · Answer

wait its 7x^2 lol

anonymous · Answer

f(x) = ln1 - ln(7x^2)
f'(x) = -[7x^2]'/[7x^2] = -14x/(7x^2) = -2/x

anonymous · Answer

so ln1 = 0??

anonymous · Answer

and i just take the derivative of the second part?

.sam. · Answer

yep

.sam. · Answer

-2/x?

anonymous · Answer

yeah my online hw took that answer as correct. just trying to understand the how for my exam..

anonymous · Answer

i get the derivatives rules, but when "ln" is thrown in the mix, i get lost

anonymous · Answer

should i treat ln as a type of variable? I can't wrap my head around natural log very wel