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La $f : I \\to \\mathbb{R}$ være en funksjon med $a \\in I$, og anta at $f$ er $n$-ganger deriverbar i punktet $a$. Husk at Taylor-polynomet til $f$ av grad $n$ om punktet $a$ er

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$T_nf(x)=\\sum\\limits_{k=0}^n \\frac{f^{(k)}(a)}{k!}(x-a)^k$ og restleddet er gitt ved $R_nf(x)=f(x)-T_nf(x)$.

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La $g(x)=e^x$ og $a=0$. Da er

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$(T_0g)(x)=$ [[0]]  og $(T_0g)(0.2)==$ [[4]]

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$(T_1g)(x)=$ [[1]]  og $(T_1g)(0.2)=$ [[5]]

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$(T_2g)(x)=$ [[2]]  og $(T_2g)(0.2)=$ [[6]]

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$(T_3g)(x)=$ [[3]]  og $(T_3g)(0.2)=$ [[7]]  (avrund til 4 desimaler)

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Regn ut med kalkulator $e^{0.2}$ = [[0]]  (avrund til 4 desimaler)

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La $g(x)=e^x$ og $a=0$, som over. Da er

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$(R_0g)(0.2)=$ [[0]] (avrund til 4 desimaler).

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$(R_1g)(0.2)=$ [[1]] (avrund til 4 desimaler).

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$(R_2g)(0.2)=$ [[2]] (avrund til 4 desimaler).

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$(R_3g)(0.2)=$ [[3]] (avrund til 4 desimaler).

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La $g(x)=e^x$ og $a=0$, som over. For hvilken naturlige tall $n$ er $\\lvert (R_ng)(.2) \\rvert $ mindre enn $10^{-6}=.000001$?  

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