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Hunter-Best [27]
3 years ago
6

Kinda been stuck on this one, someone pls let me know

Mathematics
2 answers:
laila [671]3 years ago
7 0

Answer:

255

Step-by-step explanation:

∑ᵢ₌₁⁸ 2ⁱ⁻¹

Using brute force method:

S = 2⁰ + 2¹ + 2² + 2³ + 2⁴ + 2⁵ + 2⁶ + 2⁷

S = 1 + 2 + 4 + 8 + 16 + 32 + 64 + 128

S = 255

Using formula:

S = a₁ (1 − rⁿ) / (1 − r)

S = 1 (1 − 2⁸) / (1 − 2)

S = 255

yulyashka [42]3 years ago
5 0

Answer:

255

Step-by-step explanation:

use calculator

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