What's the integral of u''(x)/u'(x)?
you need to do u substitution
If you were to call v = u'(x), what would u''(x) be? You can make a new integral in terms of v. If the result tells you what v is, you can now substitute back to find an expression in terms of u.
Of course, thank you!
Btw, how is u'' to be pronounced?
u prime prime? u double prime?
"u double prime" is typical.
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