Question

find the first 4 terms of the sequence defined by the explicit rule f(n)=7(n-1)-10. Is it an arithmetic sequence?

Answer 1

This is an arithmetic sequence

f(1) = 7(0) -10 = -10

f(2) = 7(1) -10 = -3

f(3) = 7(2) -10 = 4

f(4) = 7(3) -10 = 11