December 2018 1 35 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

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