Jawabanmu

2014-09-12T18:44:17+07:00
2.y = 99x + ( 13 + 23 + 33 + .... + 1003)
y = 99x + ( n/2 ( 2a+(n-1)b)
y=99x + (99/2 ( 2. 13+ 98. 10)
y=99x + 49797

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