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l+2+3+...125



...................​


Răspuns :

A=l+2+3+....125}

l=? }=>l=1

A=1+2+3........+125

A=125×126

A=15750

Răspuns:

1+2+3+...125

125..124..123...1

125:2=...(calculezi)

1×125=125

2×?= 125