teacherpreacher
teacherpreacher
29.06.2019 • 
Mathematics

Which of the following are geometric sequences? first option: 3, 6, 9, 12, 15, 18 second option: 10, 5, 2.5, 1.25, 0.625, 0.3125 third option: 1, 3, 9, 27, 81 fourth option: 5, 10, 20, 40, 80, 160

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