Respuesta :

S1NGH

Answer:

4

Step-by-step explanation:

The common difference is found by subtracting the 2nd term from the 1st term. In this example we can say 11 is the 2nd term and 7 is the 1st term. 11 - 7 = 4.

The correct answer is -9 +4*n
Hope the answer helps you.
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