Respuesta :

Answer: 13 dots

Step-by-step explanation:

You're basically adding 4 each time around, so number 1 is 1 dot, then number 2 is 5 dots because you added 4, number 3 is 9 dots because you added 4, etc.

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Answer:

T4 = 13

Step-by-step explanation:

Using arithmetic progression

Tn = a + (n - 1)d

Where a - first term

n - n^th term

d - common difference

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