Jawabanmu

Jawaban paling cerdas!
2014-04-28T14:59:32+07:00
1/2 . n(2a+(n-1)b)=1025
1/2 . 25(10+24b)=1025
12,5(10+24b)=1025
10+24b=82
24b=82-10
24b=72
b=3
Bedanya 3
1 5 1