Q. Which word best describes this formula for the sequence an?an=−6an−1+6an−3+3an−4Choices:(A)explicit(B)recursive
Examine Formula: Look at the formula: an=−6an−1+6an−3+3an−4. Does it use previous terms of the sequence to find the nth term? Yes, it uses an−1, an−3, and an−4.
Implicit vs Explicit: Since the formula depends on previous terms, it's not explicit. An explicit formula would directly calculate an based on n alone.
Recursion Defined: The formula is recursive because it defines each term using previous terms in the sequence.
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