MR 04

In den folgenden Formeln kommen immer genau 3 Zahlen vor. Die Fragen lauten: "Was kommt heraus?" - und: "Warum gerade das?"

$17+18+20$

$5\cdot (4+7)$

$7^{2}+6$

$\sum _{i=1}^{2\cdot 5}i$

Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle \binom{8}{3} - 1}

Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle n=3;\binom{6}{n} + \binom{7}{n}}

Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle \sqrt{{6050}\over{\pi}}\cdot \int\limits_{x\in \mathbb{R}^+} e^{- {{x^2} \over 2}} \, dx}

Gesucht ist die positive Nullstelle des Polynoms Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle x^2 + 10x -3575}

Konrad ist (heute) 88 Jahre alt. Konrad ist heute vier Mal so alt wie Angelika damals war als Konrad genauso alt war, wie Angelika heute ist.