Q. Which word best describes this formula for the sequence an?an=−21Choices:(A) explicit(B) recursive
Formula Analysis: Look at the formula: an=−21. Does it use previous terms or just the index n?Since there's no n in the formula, it doesn't use the index n or previous terms.
Constant Value: The formula an=−21 is constant for all n, meaning it doesn't change with n. This type of formula is known as explicit because it directly gives the value of each term without reference to other terms.
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