In a certain arithmetic sequence, a5=12 and a6=16. What is a1?

Larce asked May 4, 2023

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Larce asked May 4, 2023

by Larce

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18 votes

Answer:

Step-by-step explanation:

The nth term of an arithmetic sequence is obtained using the formula:

Given the following:

$\begin{gathered} a_5=12\implies a_1+4d=12 \\ a_6=16\implies a_1+5d=16 \end{gathered}$

Subtracting, we have:

Duplode answered May 11, 2023

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