Jawab:
Un= 1/2 x n x (n+1)
U10=1/2 x 10 x (10+1)
= 5 x 11
U10= 55
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Jawab:
Un= 1/2 x n x (n+1)
U10=1/2 x 10 x (10+1)
= 5 x 11
U10= 55