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Efrctueaza folosind proprietatile adunarii: 1,01+2,02+3,03+4,04+5,05+6,06+7,07+8,08=

Răspuns :

1,01+2,02+3,03+4,04+5,05+6,06+7,07+8,08=
1,01
·(1+2+3+4+5+6+7+8)=
1,01·36=36,36
1,01+2,02+3,03+4,04+5,05+6,06+7,07+8,08=1,01(1+2+...+8)=1,01•8•9/2=36,36