What is the rule for the following geometric sequence? 64, 128,256, 512...?

Correct  aₙ = a₁ · 2ⁿ⁻¹

Step-by-step explanation:

Given: Geometric sequence

64, 128, 256, 512,

First term a₁ = 64

Second term a₂ = a₁ · 2 = 128

Third term a₃ = a₂ · 2 = a₁ · 2² = 256

Fourth term a₄ = a₃ · 2 = a₁ · 2³ = 512

n - th term  aₙ = a₁ · 2ⁿ⁻¹

God is with you!!!

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

happy to

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