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Jumlah bilangan terbesar dan terkecil adalah 19 + 23 = 42
2n+1+2n+3+2n+5 = 63
6n+9 = 63
6n = 63-9
6n = 54
n = 9
jumlah bilangan terkecil dan terbesar;
(2n+1)+(2n+5) = 2(9)+1 + 2(9)+5
= 18+1 + 18+5
= 19+23
= 42