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Calculati sumele:
a) S=1+2+.....+304
b) S=1+2.......+2017
c) S=2+4+6......+2400
d) S=41+42+43.......+1000

DAU COROANA

Răspuns :

RonWeasley
a) S= (304×305):2= 92720:2= 46360
b) S=(2017×2018):2=4070306= 2035153
c) S=(2400×2500):4=6000000÷4= 1500000
d) S= (1000×1001):2-40= =1001000÷2-40=500500-40= 500460

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