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ICSE Class 10 Mathematics Question 20 of 49

Multiple-Choice Questions — Question 20

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Question

Question 20

Which of the following is not a geometric progression ?

  1. 13,1,3,9\dfrac{1}{3}, 1, 3, 9

  2. 15,15,15,15\dfrac{1}{5}, \dfrac{1}{5}, \dfrac{1}{5}, \dfrac{1}{5}

  3. -2, 4, -8, 16

  4. 2, 0, 4, 0, 8, 0

Answer

In the series,

2, 0, 4, 0, 8, 0

02≠40\dfrac{0}{2} \ne \dfrac{4}{0}

∴ 2, 0, 4, 0, 8, 0 is not a G.P.

Hence, Option 4 is the correct option.