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Verified answer
Deret1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19
Kelompokkan..
(1 + 19) + (3 + 17) + (5 + 15) + (7 + 13) + (9 + 11)
20 + 20 + 20 + 20 + 20
= 100
4 + 12 + 20 + 28 + 36
16 + 48 + 36
64 + 36
100