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b=64+2×(1+2+3+...+63)

Răspuns :

b= 64+2×[(63×64):2]
b=64+2×(63×32)
b=64+2×2016
b=64+4032
b=4096
B=64+2×(1+2+3+...+63); B=64+2×{[63×(1+63)]÷2}; B=64+2×[(63×67)÷2]; B=64+2×(4221÷2); B=64+2×2110,5; B=64+4221; B=4285.