September 2018 1 37 Report
Tentukan hasil dari .... ( tanpa mengitung satu persatu )
a. 2+4+6+8+10+ -... +100 ?
b. -1+2-1+4-5+6-7+8- ...+100 ?
c. -100 -99 -98 - ... -2-1-0+1+2+3+ ...+97+98+99 ?

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