Final answer:
To find the first term of the sequence defined by a formula, substitute the value of n and evaluate the expression.
Step-by-step explanation:
To find the first term, a₁, of the sequence defined by the formula an = 4n-1, we substitute 1 for n:
a₁ = 4(1) - 1 = 4 - 1 = 3
Therefore, the first term of the sequence is 3.
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