what's the trouble? Each term, starting with the 3rd, is the sum of the two previous terms.
Since the first two terms are 9,9 the sequence continues with
9+9 = 18
9+18 = 27
18+27 = 45
...
You might try writing the sequence as
a_(n+1) = a_n + a_(n-1)
saves using all those noisy words.
Find the first 4 terms of the recursively defined sequence.
a subscript 1 =9, a subscript 2 =9, a Subscript n+1=a Subscript n +a Subscript n-1
Are the first four terms
A)9,9,18,18
B)9,9,9,27
C)9,9,81,729
D)9,9,18,27
1 answer
1 answer