Respuesta :

this is an arithmetic sequence since every number has 5 in it
mathstudent55

Answer:

a_n = 5n, for n ≥ 1

Step-by-step explanation:

a_1 = 5

a_2 = 10 = 5 + 5 = a_1 + 5

a_3 = a_2 + 5

a_n = a_(n - 1) + 5

a_n = 5n

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