November 2020 0 64 Report
Digit terakhir dari jumlahan

[tex]3(1 \times 2019 + 2 \times 2018 + 3 \times 2017 + ... + 2019 \times 1)[/tex]
adalah...

a. 1
b. 3
c. 5
d. 7
e. 9


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