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Esta é unha revisión antiga do documento!


$$ \frac{d}{dx}\left( \int_{0}^{x} f(u)\,du\right)=f(x) $$

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\put(61,13){$x$}
\put(20,4){\vector(0,1){37}} 
\put(19,43){$y$}
\put(50,34){\circle*{2}} 
\put(52,35){$P$}
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\put(14.5,33.5){$y_P$}
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\put(48,11){$x_P$}
\put( 2,8){\vector(3,1){56}} 
\put(59,26.5){$x'$}
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\put(52,22){$x_P'$}
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\put(12,21){$y_P'$}
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\put(10,41){$y'$}

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