August 2018 1 11 Report
Tentukan hasil dari(tanpa menghitung satu persatu)
a. 1+3+5+7+9......+99
b. 1-2+3-4+5-6+7-8+......-100
c. -100-99-98-.....-2-1-0+1+2......+48+49+50
tolong jawab y ......

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