Question

bantuiin cepattt kakkk un

Answer 1

Deret aritmetika

[tex]sn = \frac{n}{2} (2a + (n - 1)b) \\ \\ s30 = \frac{30}{2} (2.17 + (30 - 1)3) \\ \\ s30 = 15(34 + 87) \\ \\ s30 = 15(121) \\ \\ s30 = 1.815 \: (A)[/tex]

Answer 2

Jawaban:

A

Penjelasan dengan langkah-langkah:

rumus jumlah suku deret aritmatika Sn = n/2 (2a + (n - 1) b)

S30 = 30/2 (2.17 + (30 - 1)3)

= 15 ( 34 + (29.3))

= 15 (34 + 87)

= (15 × 34 ) + (15 × 87)

= 510 + 1305

= 1815