Final answer:
To discover any term in an arithmetic sequence, use a formula based on the first term and common difference. The correct approach involves a calculation that applies subtraction and addition. Mastery of the underlying concept is more valuable than memorizing formulas.
Step-by-step explanation:
To find any term in an arithmetic sequence, you can use the formula:
nth term = first term + (n - 1) × common difference
When given a sequence, you should make a calculation, and then use subtraction and addition to find the term. Therefore, the correct answer is Option D) a calculation, subtraction and addition.
Understanding the concept behind the formula is crucial. Equations in mathematics can be seen as sentences expressing certain truths. Once you grasp the fundamental principle, the usage of equations becomes more about application rather than memorization.