27020: Difference between revisions
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'''27020 (Gheorghe Szöllösy)''' | '''27020 (Gheorghe Szöllösy)''' | ||
Să se calculeze suma <math> \sum_{k=0}^\left[\frac{n}{2}\right] \left\dfrac{1}{4^k \cdot (k!)^2(n-2k)!}\right, n \geq 1 </math> | Să se calculeze suma <math> \sum_{k=0}^\left[\frac{n}{2}\right] \[left\dfrac{1}{4^k \cdot (k!)^2(n-2k)!}\right], n \geq 1 </math> | ||
Revision as of 17:06, 18 October 2023
27020 (Gheorghe Szöllösy)
Să se calculeze suma Failed to parse (syntax error): {\displaystyle \sum_{k=0}^\left[\frac{n}{2}\right] \[left\dfrac{1}{4^k \cdot (k!)^2(n-2k)!}\right], n \geq 1 }