Pake cara yaa……​

Jawaban:

semoga membantu

Penjelasan dengan langkah-langkah:

Der. Geo

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U² = 6 dan U⁶ = 96

r = U⁶/U²

r = r⁵/r

r = r⁴ = 96/6

r = ⁴√16

r = 2

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ar = 6

2a = 6

a = 3

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a). suku ke lima

Un = arⁿ-¹

U5 = 3 . 2⁵-¹

U5 = 3. 2⁴

U5 = 3. 16

U5 = 48

b). Jumlah Lima suku pertama

Sn = a (1 – rⁿ) / (1 – r) , r < 0

S⁵ = 3 (1 – 2⁵) / (1 – 2)

S⁵ = 3 (1 – 32)/ (-1)

S⁵ = 3 (-31)/(-1)

S⁵ = 3. (31)

S⁵ = 93