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Khallil (Offline) Male Morocco

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  • About Khallil

    For a function to be continuous at a point :

    i) f must be defined at c so \exists f(c)

    ii) \exists\displaystyle\lim_{x\to c} \Leftarrow \displaystyle\lim_{x\to c^{+}}f(x) = \displaystyle\lim_{x\to c^{-}}f(x)

    iii) \displaystyle\lim_{x\to c}f(x) = f(c)

    De Moivre's Theorem

    [re^{i\theta}]^{\alpha} = r^{\alpha}(\cos \alpha\theta + i\sin \alpha\theta)

    Solving Differential Equations of the type :

    \frac{dy}{dx}+yP(x)=Q(x)
    with an integrating factor of e^{\int P(x)\ dx}

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  • Join Date 20-08-2011

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