suma=1+3+5+7+....125​

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2 September 2025 matematica 5 minute
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Clasă: Education Materie: matematica
suma=1+3+5+7+....125​
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Cel mai bun răspuns
(259)

Explicație pas cu pas:

formula este S=[n×(n+1)]/2

S=1+2+3+4+...+124+125-(2+4+6+...+124)

S=(125×126)/2-2(1+2+3+...+62)

S=125×63-2×62×63÷2

S=125×63-62×63

S=63(125-62)

S=63×63

S= 3969

Răspunsul a fost dat în data 2 September 2025
(31)

1+3+7+110=125 atat bine

Răspunsul a fost dat în data 2 September 2025

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