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= 25
Jawabanmu sudah benar
bari ke 2= baris 1 + 4
baris ke 3= baris ke 2 + 5
baris ke n = baris ke n-1 + (n+2)
hingga baris ke 5 = baris ke 4 + 7
= baris ke 3 +13
= 12 + 13
= 25