September 2018 1 19 Report
Tentukan hasil dari (tanpa menghitung satu persatu)
a.− 1 + 2 − 3 + 4 − 5 + 6 − 7 + 8 − ... + 100 =
b.− 100 − 99 − 98 − ... − 2 − 1 − 0 + 1 + 2 + 3 + ... + 97 + 98 + 99 =

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