Question

List the first four terms of each sequence

an = 4n+9
(a).a₁ =
(b).a₂ =
(c).a₃ =
(d).a₄ =

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Answer 1

To find the first four terms of the sequence an = 4n + 9, substitute n=1,2,3,4 into the formula. The terms are 13, 17, 21, and 25 respectively.

Step-by-step explanation:

The task is to find the first four terms of the sequence defined by the formula an = 4n + 9. We can find these terms by substituting the sequence numbers (1, 2, 3, and 4) into this formula.

• (a). a1 = 4(1) + 9 = 4 + 9 = 13
• (b). a2 = 4(2) + 9 = 8 + 9 = 17
• (c). a3 = 4(3) + 9 = 12 + 9 = 21
• (d). a4 = 4(4) + 9 = 16 + 9 = 25

Therefore, the first four terms of the sequence are 13, 17, 21, and 25.