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Lesson 2 Questions: Geometric Sequences, Series and Applications — Lesson quiz

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1.
If x − 1, x + 2 and 3x are consecutive terms of a geometric sequence, the positive value of x is:
2
3
4
6
2.
In a geometric sequence with positive terms, T₃ = 12 and T₆ = 96. The sum of its first 8 terms is:
255
765
1,530
192
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