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let-f-x-1-cosx-find-f-n-x-




Question Number 36907 by prof Abdo imad last updated on 07/Jun/18
let  f(x)=  (1/(cosx))  find f^((n)) (x)
$${let}\:\:{f}\left({x}\right)=\:\:\frac{\mathrm{1}}{{cosx}}\:\:{find}\:{f}^{\left({n}\right)} \left({x}\right) \\ $$

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