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La funksjonen $f$ være gitt ved $f(x)=\\simplify{{a}x^2+{b}x+{c}}$. 

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Likningen til tangenten til $f(x)$ i punkt $x=c$ er

\n

$y=f'(c)(x-c)+f(c)$

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Finn den deriverte $f'(x)$

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Finn den deriverte i punktet $x=\\var{d}$, dvs. $f'(\\var{d})$

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Likningen til tangenten til $f(x)$ i punktet $x=\\var{d}$ blir $y=$[[0]]

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