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(102x25)-(100x25) gunakan fungsi distributif kalo gak salah
(102-100)x25
50
= (-1 + 2) + (-3 + 4) + (-5 + 6) + (-7 + 8) + .... + (-99 + 100)
= 1 + 1 + 1 + 1 + .... + 1 -------------------> sebanyak 50 kali
= 50. 1
= 50