Is the sequence 5,9, arithmetic?

No, the given sequence is not arithmetic.

Step-by-step explanation:

The given sequence is

The first term is 5.

A sequence is an arithmetic, if the difference between any two consecutive terms are same.

The difference between terms are

Since the difference between consecutive terms are not same, therefore given sequence is not arithmetic.

5, 9, 15,....is not an arithmetic sequence.

Step-by-step explanation:

Arithmetic sequence  is a sequence in which difference between the consecutive terms is constant.

Example: 0 , 5, 10, 15, 20 is an arithmetic sequence with common difference of 5 between the terms.

Consider the given sequence,

5, 9, 15,....

Here,

We first find the difference between the terms,

Since the difference is not constant .

So,it is not an arithmetic sequence.

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step-by-step explanation: