October 2018 1 26 Report
Tentukan hasil dari (tanpa menghitung satu persatu)
a. 2 + 4 + 6 + 8 + 10 + ... + 100
b. − 1 + 2 − 3 + 4 − 5 + 6 − 7 + 8 − ... + 100
c. − 100 − 99 − 98 − ... − 2 − 1 − 0 + 1 + 2 + 3 + ... + 97 + 98 + 99

jangan jawab asal !! sertakan cara !!

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