7+8+9+...+310= ??
si a doua
2+4+6+....+502= ??
Va rog sa ma ajutati !! :)

Răspunsul a fost dat de: USER4741
26 Agustus 2025 matematica 5 minute
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Întrebare

Clasă: Education Materie: matematica
7+8+9+...+310= ??
si a doua
2+4+6+....+502= ??
Va rog sa ma ajutati !! :)
Întrebare a fost pusă de:
91 Vezi 91 Răspunsuri

Răspuns (91)

Cel mai bun răspuns
(121)
1) 7+8+9+…+310=(7+310)+(8+309)…= 317×(310÷2)=317×155=49135. 2) 2+4+6+…+502=(2+502)+(4+500)+…=504×(502÷2) =504×251=126504.
Răspunsul a fost dat în data 26 Agustus 2025

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