A=4+8+12+....+8000-(7+14+...+714)

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31 Agustus 2025 matematica 5 minute
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A=4+8+12+....+8000-(7+14+...+714)
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A=4+8+12+....+8000-(7+14+...+714)
Ne folosim de suma lui Gauss

A=4(1+2+3+...+2000)-7(1+2+...+102)
A=4[2000x(2000+1):2]-7[102x(102+1):2]
A=4(2000x2001:2)-7(102x103:2)
A=4x2001000-7x5253
A=8004000-36771
A=7967229
Răspunsul a fost dat în data 31 Agustus 2025

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