Question

⚡Soalan⚡
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Diketahui deret hitung 1 + 3 + 5 + 7 + …… Tentukan jumlah 200 suku pertamanya


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Answer 1

Materi : Barisan dan Geometri

Pola barisan aritmatika

1, 3, 5, 7, ...

Suku Pertama = 1 , Beda = 2

Maka Un = 2n - 1

Ket : U200 = 2(200) - 1 = 399

Jumlah 200 Suku Pertama

Sn = n/2( a + Un )

S200 = 200/2( 1 + U200 )

S200 = 100( 1 + 399 )

S200 = 100( 400 )

S200 = 40.000

Semoga bisa membantu

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Answer 2

Verified answer

RUMUS :

sn = n/2 × (a + un)

MAKA :

= 200/2 × (1 + (2 × 200) - 1)

= 200/2 × (1 + (400 - 1)

= 200/2 × (1 + 399)

= 200/2 × 400

= (200 × 400)/2

= 80.000/2

= 40.000