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fungsiufungBest ResponseYou've already chosen the best response.1
\[f(x)=\frac{4tanx}{x} => f'(x)=\frac{ x(4tanx)'4tanx(x)' }{ (x)^2 }=\frac{ 4xsec ^2 x4\tan x }{x^2 }\]
 one year ago
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