April 2021 1 91 Report
Kuis ¼ ribu followers (dikit, tapi bersyukur)

1,3,6,10

tentukan suku ke n dan suku ke 10!

Rumus:
[tex] \frac{n(n + 1)}{2} [/tex]
Bener atau nggak?

kuis sebelumnya dihapus​

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