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What is the explicit formula of the arithmetic sequence?2, -2, -6, -10

User Shaun Han
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We have the following sequence


2,-2,-6,-10

We calculate the pattern of change like this:


\begin{gathered} -10-(-6)=-10+6=-4 \\ -6-(-2)=-6+2=-4 \\ -2-2=-4 \end{gathered}

Therefore, by knowing the pattern of change, we can know the explicit formula


a(n)=2-4(n-1)

User Narwanimonish
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