I'm having problems with this one:(adsbygoogle = window.adsbygoogle || []).push({});

y= [sec^2(x)] / [x^2 + 1]

dy = tanx(x^2+1) - 2x(sec^2) dx / (x^2+1)^2

That's basically what I got so far, is that it, or can I simplify more (or did I derive something wrong)?

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# 'Find the differential dy'

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