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#### r3dxP

**[SOLVED] differentiating [ sin(1/ln(x)) / x ].. solution?**

hello all. I do not have the solution to this question that im about to ask. But if you find the time, try this solving this problem and feel free to type your answer and compare with mine.

differentiate :: sin(1/ln(x)) / x

my answer: -[ ( (sin(1/lnx)*(ln(x)^2) + cos(1/ln(x)) ) / ( (x^2)*(ln(x)^2) ) ]

i am extremely curious about what you all got. I want to see if i did it correctly. Thanks in advance.

I found some time to find the d^2y/dx^2 of this f().

answer #2 for d^2y/dx^2 : { [ (cos(1/lnx))(2+4lnx+2(lnx)^2+(x^2)(lnx)^3) ]+[ (sin(1/lnx))* (lnx) * (4(lnx)^2 - x^2+2(lnx)^3) ] } / { [(lnx)*x]^3 }

woah, i spent so much time doing it.. if you guys have a time to do it, post your answer pls! thanks again.

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