Final answer:
To find the fifth term in an arithmetic sequence with the first term of 5 and a common difference of 4, use the formula An = A1 + (n - 1)d. The fifth term, A5, is calculated to be 21.
Step-by-step explanation:
The question pertains to finding the fifth term (A5) in an arithmetic sequence where the first term (A1) is 5, and the common difference (d) is 4. To find the fifth term, we will use the formula for the nth term of an arithmetic sequence, which is An = A1 + (n - 1)d.
Applying the formula for the fifth term:
So, A5 = 5 + (5 - 1) × 4 = 5 + 16 = 21.
Therefore, the fifth term in the sequence is 21.