F(-5) if f(x) = -x - 4
2 answers:
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A. (1, 0) and (–6, –28)
B. (1, 20) and (6, 0)
C. (1, 0) and (6, 20)
D. no solution
Correct answer is C.
I assume you're asking to solve for the n-th term in the sequence, .
From the given recursive rule,
and by substitution,
Similarly,
The pattern continues, so that we can write the n-th term in terms of the 1st one:
So the first few terms of the sequence are
{10, 12, 14, 16, 18, 20, …}