Penjelasan dengan langkah-langkah:
DERET GEOMETRI
a = 8
r = 4
8
r = ½
1/32 = 8 × ½ⁿ-¹
2^-5 = 2³ × 2¹-ⁿ
2^-5 = 2⁴-ⁿ
-5 = 4 – n
n = 4 + 5
n = 9
S9 = 8 × ( 1 – ½^9)
1 – ½
S9 = 8 × ( 512 – 1)
512 × ½
S9 = 8 × 511
256
S9 = 511
32
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Penjelasan dengan langkah-langkah:
DERET GEOMETRI
a = 8
r = 4
8
r = ½
1/32 = 8 × ½ⁿ-¹
2^-5 = 2³ × 2¹-ⁿ
2^-5 = 2⁴-ⁿ
-5 = 4 – n
n = 4 + 5
n = 9
S9 = 8 × ( 1 – ½^9)
1 – ½
S9 = 8 × ( 512 – 1)
512 × ½
S9 = 8 × 511
256
S9 = 511
32
S9 = 15 ³¹/32