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Use the approach in Gauss's Problem to find the following sums of arithmetic sequences.

a. 1+2+3+4+...+998
b. 1+3+5+7+...+97
c. 2+5+8+11+...+302
d. 908 +899+890+881+...+8

a. The sum of the sequence is

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Allrounder30

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${teks-lihat-gambar} Allrounder30
${teks-lihat-gambar} Allrounder30
${teks-lihat-gambar} Allrounder30

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