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Define the sequence below
7, 14, 28, 56, 112

Arithmetic
Geometric
Arithmetic and geometric


Sagot :

Answer:

To determine the nature of the sequence 7, 14, 28, 56, 112, let's analyze it:

**Arithmetic Sequence**:

An arithmetic sequence is one in which each term after the first is obtained by adding a constant difference to the previous term.

Let's check if the sequence 7, 14, 28, 56, 112 is arithmetic:

- Difference between 14 and 7: \( 14 - 7 = 7 \)

- Difference between 28 and 14: \( 28 - 14 = 14 \)

- Difference between 56 and 28: \( 56 - 28 = 28 \)

- Difference between 112 and 56: \( 112 - 56 = 56 \)

The differences (7, 14, 28, 56) are not consistent, indicating that the sequence is not arithmetic.

**Geometric Sequence**:

A geometric sequence is one in which each term after the first is obtained by multiplying the previous term by a constant ratio.

Let's check if the sequence 7, 14, 28, 56, 112 is geometric:

- Ratio between 14 and 7: \( \frac{14}{7} = 2 \)

- Ratio between 28 and 14: \( \frac{28}{14} = 2 \)

- Ratio between 56 and 28: \( \frac{56}{28} = 2 \)

- Ratio between 112 and 56: \( \frac{112}{56} = 2 \)

The ratios (2, 2, 2, 2) are consistent, indicating that the sequence is geometric with a common ratio of 2.

Therefore, the sequence 7, 14, 28, 56, 112 is **geometric**.

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